2024 Jake brake not working on high

Working of a Jake Brake. It is important to understand that jake brakes work on the hydraulic system. The jake brake uses the engine's compression for creating resistance and slows down the truck. Once the brake pedal is pressed, fluid travels from the master cylinder towards the slave cylinder. This puts pressure on the pistons.. Jaydayoungan net worth 2022

Jake brake not working. 2006 Freightliner columbia. ... Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent. Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified ...Removed valve covers, Cyliders 3-4 jakes work on low. Cylinder 1-2 and 5-6 work on medium. On high only banks 1-2 and 5-7 work. The middle bank does not compress the Jake slave pistons. Used scanner and ecm recognizes low medium and high brake position.19 posts · Joined 2012. #1 · Mar 24, 2012. I have a 2006 ISX 450 and the jake brakes sometimes run very choppy and rough, enough to shake the whole truck somewhat violently. The problem comes and goes but seems to be warm weather related. It happened a lot last summer and stopped completely this winter and is returning now …This is one of the biggest myths in trucking. The answer is NO. Using an engine brake has zero impact on the life of your truck. The jakes are simply releasing compression in the engine as a way to reduce the energy being sent to the crankshaft. There is nothing in this process that is harming the engine.Posts: 10,996. Joined: Jun 2013. RE: CM870 Jake Brake Issue. (03-19-2021 )Psuce1 Wrote: The engine makes about 15psi of boost when the Jake is on. No change in boost pressure between stage 2 or 3. It makes the correct amount of boost under load but I have not checked for leaks. I am planning on doing that though.I am not a mechanic and don't claim to be one but I had a 379 years ago that did this same thing. All it was was the spring on the clutch pedal. The pedal wouldn't fully release and this caused cruise and jake to not work.Cruise control and Jake Brake: CoreyinWP: Entegra Owner's Forum: 14: 07-31-2014 09:50 AM: 2004 Monaco Signature Jake Brake and Cruise Control Failure: OldeDoggie: Monaco Owner's Forum: 46: 02-18-2014 10:26 PM: Cruise Control and Jake Brake: Tom&Marie: Monaco Owner's Forum: 10: 10-20-2012 06:40 AM: Jake brake activation while in cruise control ...I have 2004 freightliner columbia, intermittingly jake brake do not work. ... Have 91 379 w/ detroit ddec ll cruise will control high idle - but NOT road speed- have been to pete dealer twice- tune of $1500.oo- replace parking brake air switch. all wires and switches appear to ...2005 c15 acert jakes not working properly...will work on low…. Hi my name isXXXXX will try to help.... Using a small screw driver with your valve covers off and the enginge idling, push down on the plunger in the middle of each jake one by one. This is mechanically bypassing the electrict solenoid.Jake brakes are a proven, effective, reliable, safe method for slowing a vehicle. Think of it like shifting your car into a lower gear while rolling downhill. A jake brake has a similar effect on the truck and prevents the driver from needing to engage the brakes so often. Second, jake brakes are able to be engaged in different settings.No Jake brake or Cruise control Discussion in ' ... When I got back on the road I noticed that neither the Jake or cruise ctrl is working. My first thought was maybe a fuse or relay...Unfortunately the labels in the fuse panel are hard to read. ... I bet if you have auto shut down idle timer to kill the engine it doesn't work either. Or high ...If the Jake brake on your 2004 Freightliner Columbia 120 with a Detroit Series 60 14L DDEC V engine is not working, there could be several possible reasons for this issue. Here are some common troubleshooting steps you can take:Check the Jake brake switch: Make sure that the Jake brake switch is functioning properly.Removed valve covers, Cyliders 3-4 jakes work on low. Cylinder 1-2 and 5-6 work on medium. On high only banks 1-2 and 5-7 work. The middle bank does not compress the Jake slave pistons. Used scanner and ecm recognizes low medium and high brake position.2005 c15 acert jakes not working properly...will work on low…. Hi my name isXXXXX will try to help.... Using a small screw driver with your valve covers off and the enginge idling, push down on the plunger in the middle of each jake one by one. This is mechanically bypassing the electrict solenoid.Having trouble with the Jake brake on my 5EK 1996 3406E engine. After it is activated it does not shut off with the accelerator or dash switch -just keeps going even if I accelerate. It finally will quit on it's own. Just started doing this last week. A mechanic told me it was a bad solenoid so I replaced all 3 with new CAT solenoids.The Jake brake doesn't seem to work under 1800-2000 RPMs then will kick in and be very strong but will kick in and out every 2 seconds, like someone is turning the switch off and on. It does this very consistently. I'm thinking it's got to be an electrical issue, clutch switch is good, not sure how to check the fuel switch on this one.Provided the smart wheel, clutch, and brake switch is working properly Jake's brake can still not work given if you cut the truck on and off. There are many reasons why Jake's brake may fail like a problem with the power switch or fuse, an issue with the speedometer, cruise, and the floor mat. Take your time to follow my tips and guidelines ...A Jake Brake is a separate component installed on diesel engines. When engaged, it releases compressed air, using kinetic energy to slow the vehicle. This is why truck drivers also refer to it as the "compression release brake". Basically, it puts resistance or drag on the crankshaft, and therefore on the tires, to slow the vehicle down.Supplying a ground enables the Jake brake for Cylinders 3, 4, 5, and 6. Low Jake request (pin K3) Supplying a ground enables the Jake brake for Cylinders 1 and 2. Park Brake (pin H2 on the ECM) Has no effect on Jake functions. Service Brake (pin G2 on the ECM) Has no effect unless Jakes are programmed to only come on with service brake. ThrottleSince the Jake Brake ® was introduced in 1961, we have been a partner in the trucking industry's quest for safe, reliable, and efficient commercial vehicles. Today, over 10 million Jake Brakes have been sold globally, and now the Jacobs Engine Brake ® has a new home at Cummins. As part of the Cummins family, we will continue to supply you with industry-leading engine brakes as well as ...The mechanic says I am burning up the brakes way too fast by not using the jake brake. ... On my 2020 cascadia when I first used the Jake brake my RPM's went up high too. If you tap on the foot brake it will reduce the RPM'S but your Jakes are still on when you let off the foot brake. Once you learn how they work and set it correctly you won't ...If the Jake brake on your 2004 Freightliner Columbia 120 with a Detroit Series 60 14L DDEC V engine is not working, there could be several possible reasons for this issue. Here are some common troubleshooting steps you can take:Check the Jake brake switch: Make sure that the Jake brake switch is functioning properly.speed sensor new, brake pedal switch working , brake air pressure sensor working one next to clutch pedal on the fire wall , clutch switch working , engine brake working ,speedometer working , cruise will work when the truck is parked,will not work when in motion Controls for the cruise, of, on, resume, + and all working when parkedIf you start the truck with low air in the tanks, you should also hear the exhaust brake come on as air pressure builds after you start the engine. The Volvos use the exhaust brake to help the engine warm up faster (and stay warm at idle). Quote. 2007 Volvo 780 Volvo D12D, 465hp, 1650 ft/lbs tq., ultrashift.Posted March 9, 2014. On 3/6/2014 at 4:08 PM, turckster said: An engine brake on an E-7 engine will not fit/work on an E-Tech engine. Another option, other than Jake Brake, may be the Mack Power Leash. You would have to check with the Mack parts dept. to see if your engine is compatible.C13 Jake brakes are not working Serial number is *****-Did adjustment on valve train as well-My clutch pedal switch is in the off position-Brake pedal switch is in off position-Accelerator pedal is at 3%-when in diagnostic special tests for jake solenoids I have proper power and ground to solenoids.-I removed solenoids and the inlet screens on all 3 …I have a fitzgerald 2015 peterbilt glider with a 97 12-7 DD , having issues with my jake brake and cruise working sparracticly, . I replaced the clutch switch and the return spring and still no cc or jakes. I tried to find a fuse panel with cc or jakes and come up empty. please helpIf it is weak, then the jake will be weak. Check the overhead cams for excess wear, and check the oil pressure is 34+ for the engine going down the road. Next would be the wear in the rocker bearings. if there is excess wear in the rocker bearings, or the rocker shaft (s) then it will significantly lower oil pressure to the upper part of the head.IMA KEEP IT REDNECK. Feb 13, 2019. #3. Best guess, the multi stage switch isn't functioning properly, or the orings in the valve are leaking. I'm guessing when you say the motor don't cut out that you mean the injectors keep firing. Also if your rockers are working properly that should create at least a slight stumble.If the switch is not removing ground when turned off or the wire running from the switch has rubbed into a ground, the engine ecm will continue to keep the jake turned on. To test you could disconnect the switch and see if the jake stays on. If it does, the problem is in the wiring. If it does not, the switch is the problem.Jake brakes wont work. 2003 pete 379 c15. Cat told me to unplug the two wire connector to the micro switch and use a - Answered by a verified Technician. ... On our 2003 k104 with a cat c15 6nz, we have low engine brake, no medium and low on high. We have swapped engine brake controllers with another truck and this has not fixed it.amishdonkeys Discussion starter. 247 posts · Joined 2009. #1 · Oct 9, 2011. Have a 1995 379 Pete w/ a 12.7L 60 series detroit. Jake brake and cruise control doesn't work. There is power to dash switchs for jake and cruise. Power to the clutch sensor. Clutch sensor was tested and checked out OK.The boost during Jake operation will not be as much as during "full power" acceleration, but will still be noticeable on a boost gauge. About 10 psi on the ones I've had. As said before, the position of the Jake brake dash switch is irrelevant during throttle application because the throttle switch controlling the Jake is in the "off" position ...Subject: Jake brake problem on Cummins ISX. NE, KS. I have an 07 KW (950,000) with a cummins ISX and the Jake brake has stopped working properly, we have already dumped a bunch of money into it and not fixed a thing. The problem is when we leave the yard the Jake will work fine for 15 miles and then it acts like the final stage …Now accepting support and donation to my channel. accepting: personal check, business check, money orders, gift cards, gifts, tools, shop articles, etc,.. ...Posts: 31,608. Your exhaust brake will have an air pressure solenoid , air line ( in the engine bay) and activation cylinder (on the exhaust). After you check all the fuses, check the air line from the solenoid to the cylinder for a rupture. Many owners report them being melted by the exhaust. The higher the brake setting, the greater the braking power, use lower settings in less-than-optimal road conditions. Engine should be at operating temperature and oil should not be low, when using the Jake Brake. Before descending a long, steep, grade, make sure that your Jake Brake is working properly by briefly lifting your foot off the ... my jake brake isnt working Cat CT660 JA: Im sorry to hear that your jake brake isnt working on your Cat CT660, but the truck Mechanic will be able to help you with this issue. ... On our 2003 k104 with a cat c15 6nz, we have low engine brake, no medium and low on high. We have swapped engine brake controllers with another truck and this has not ...Absolutely, Mark. If you're smelling the brakes and gaining too much speed downhill, trying a lower gear like 8th might help control your speed better with less brake use. The Jake Brake's effectiveness can vary between trucks, so even if the dealer says it's working, it might not feel as strong as you're used to.When I use the brakes with the Jake brake on and on high I see no results, even after down shifting to 4th. Do I have a problem other than mental? ... You can test to see if the jake is working by simply starting the engine from the drivers seat with the toll window open, increasing the rpm's with the transmission in neutral, then releasing the ...The use of Jake Brakes when traveling downhill can increase the lifespan of the brakes and tires on a truck when utilized properly. However, Jake Brakes are very loud, so certain areas restrict their use. How Jake Brakes Work. Jake Brakes are turned on when the driver flips an engine brake switch. When the Jake Brakes are powered on, all a ...When it comes to purchasing a pre-owned vehicle, there are numerous factors to consider. One crucial aspect is choosing the right dealership that offers reliable and high-quality o...Jul 17, 2022 · Good Day Gents, I need some help with a Freightliner with a Detroit Series 60 engine please. 06/2002 1FUJAPC943DK67814 engine DD06R0692264 The issue is the idle up does not work and Jake Brakes worked … read more low, cylinders 3&4. medium, cylinders 1,2,5,6. & high all 6 cyliners is how an n14 or any older 855 operates. They have 3 separate engine brakes. Your engine has 2 engine brake solenoids that control 3 cylinders each. A more common problem on your engine is that the rocker shafts wear causing an internal oil leak at the engine brake control valves.The higher the brake setting, the greater the braking power, use lower settings in less-than-optimal road conditions. Engine should be at operating temperature and oil should not …Author Topic: Jake Brakes Not Working (Read 7054 times) buswarrior. Hero Member; ... Stock, the two toe switches were for high beam and the optional fog lights. The heel switch was either the plunger button for the optional air horn, or was a momentary switch wired to the electric bill horns, parallel to the steering wheel mounted buttons.Provided the smart wheel, clutch, and brake switch is working properly Jake's brake can still not work given if you cut the truck on and off. There are many reasons why Jake's brake may fail like a problem with the power switch or fuse, an issue with the speedometer, cruise, and the floor mat. Take your time to follow my tips and guidelines ...Jan 6, 2018 ... Now accepting support and donation to my channel. accepting: personal check, business check, money orders, gift cards, gifts, tools, ...When is the engine brake most effective? At high RPMs with the transmission in a low gear ... The Jake Brake actually limits the amount of exhaust that can flow out of the engine. ... its mostly used 6 thru 10 gear, 25 to 65 mph, at 1300 to 1800 rpm. And works better the higher the RPM but will work on my truck from 1300 to 1800. Woody's ...On your steering wheel, press the engine brake button. This will also light up the engine brake icon on your left dashboard and the buttons on your right. Step 2. Select the level you need from the button on your right: high, medium, or low. Step 3. Slowly release pressure while stepping off of the accelerator.Find out what Jake Brakes actually are and how they work to slow down enormous semi-trucks, pickup trucks, and trailers. There’s no doubt you’ve heard Jake Brakes being used on semi-trucks ...A Jake Brake goes a step further, and actually turns the engine into an air compressor to provide a great deal more braking power. If you have read How Car Engines Work, then you know that the engine goes through a compression stroke. Compressing the air in the cylinder takes power. If the engine's drive shaft is turning the engine to brake the ...Service, Parts, and Support. Here you will find all of the information to service or install your Genuine Jake Brake ® - parts and service literature, part number cross-reference, tune-up kit and solenoid lookup, where to purchase parts, and more.19 posts · Joined 2012. #1 · Mar 24, 2012. I have a 2006 ISX 450 and the jake brakes sometimes run very choppy and rough, enough to shake the whole truck somewhat violently. The problem comes and goes but seems to be warm weather related. It happened a lot last summer and stopped completely this winter and is returning now with the mid 70 ...Switch 1, 2, 3 in top or bottom position (1 or 3) and Engine Brake On/Off in Off position - switch 1 says Off and 2 says Off and value is 67. Unplug the on/off switch and the values are -both 1 and 2 say OFF and value is 0 no matter the position of the 1,2,3 switch. Unplug the 1,2,3 switch and the values are - -both 1 and 2 say OFF and value is ...That would be the Mack Dynatard.The engine model number will have a B in it eg.675entb on the plate behind the fuel pump on the block. The jacobs brake system is entirely different being a bolt on system. These are easy to pick as they use a spacer between the block and rocker cover. Altho some early Macks were fitted with jacobs brakes Mack ...When is the engine brake most effective? At high RPMs with the transmission in a low gear ... The Jake Brake actually limits the amount of exhaust that can flow out of the engine. ... its mostly used 6 thru 10 gear, 25 to 65 mph, at 1300 to 1800 rpm. And works better the higher the RPM but will work on my truck from 1300 to 1800. Woody's ...Just had ECM replaced and now Engine Brake (Jake) does not work. New ECM was programed to show unit has engine brake. Has anyone encountered this situation and most importantly what is the fix. Cummins in Irvine could not get it to work.....suggested going to repair facility that is familiar with Monaco chassis and wiring.4276 posts · Joined 2007. #7 · Jul 4, 2011. No, a Jacobs brake (compression brake) only opens one exhaust valve. If you look in the pic, the red circle shows the valve that releases compression when the brake is activated. AThe one in blue is the other exhaust valve and is only used during normal operation.Oct 10, 2013. 0. I have a 2006 379 Peter. It has 1157834 miles on a C15 Acert motor. About 2.5 months ago, my jakes seem like they are only half there. They make the sound but holding the truck or slowing it down, not so much. I found that the top of my wiring harness had been rubbed through partially by the AC lines across top of motor.BrooksAD Discussion starter. 11 posts · Joined 2018. #18 · Dec 16, 2018. 2008 6.7 - engine brake doesn't activate - still researching. Well, I guess I need to be a bit more consistent in this thread so I can get my my issues resolved! ;^) Good to read other things that are getting resolved in here, anyway.my jake brake isnt working Cat CT660 JA: Im sorry to hear that your jake brake isnt working on your Cat CT660, but the truck Mechanic will be able to help you with this issue. ... On our 2003 k104 with a cat c15 6nz, we have low engine brake, no medium and low on high. We have swapped engine brake controllers with another truck and this has not ...The multimeter model I use to troubleshoot listed on the Amazon Affiliate Link listed right here: https://www.amazon.com/gp/product/B0002YFD1K/ref=as_li_tl?...Does the Jake brake work when the cruise goes out ? My 14 was doing the same , the fix was cheap , under the dash by petal . danny23tx, Dec 17, 2018. ... APU has code 61 low or high... dismag posted Apr 27, 2024 at 2:30 AM. Peterbilt 379 Steer Axle Sidetrack421 posted Apr 26, 2024 at 9:56 PM.I have a truck that's a peterbilt 379 with a cat c15 and Jake brakes are not working on it when I turn the switch on nothing happens when I supply direct power my jake brakes work it ... inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent. Tory Johnson, GMA Workplace Contributor, discusses work …Provided the smart wheel, clutch, and brake switch is working properly Jake's brake can still not work given if you cut the truck on and off. There are many reasons why Jake's brake may fail like a problem with the power switch or fuse, an issue with the speedometer, cruise, and the floor mat. Take your time to follow my tips and guidelines ...Posted August 18, 2021. You can pull the wire off the post at the head, and put a test light on the wire and ground it to the engine. no need to drive it or even run the engine, just turn the switch on and the light should light, with the key on. you can run the engine if you like, and rev it up and let off and watch the light, if it lights on ...Removed valve covers, Cyliders 3-4 jakes work on low. Cylinder 1-2 and 5-6 work on medium. On high only banks 1-2 and 5-7 work. The middle bank does not compress the Jake slave pistons. Used scanner and ecm recognizes low medium and high brake position.Jake brake is not working Freightliner's Jake Brake ... Hi there my are not working on my C 15 2003 Freightliner Columbia. Hi there my are not working on my C 15 2003 Freightliner Columbia they only work when I speeded up and then turn off the key in the Jake's come on I change the foot pedal sensor and the clutch sensor ...The power then goes back to the cab switch for the high and low selection, then to the solenoids. That should be clear as mud. Power to the Jake switch can be off a relay that goes bad and a type 2 resets every time the power goes off. You want to test with a volt meter to check for poor connections.The compression brake does not work on high. Cylinder 3-4 Jake solenoid works on low. ... The jake brakes quit working,when the truck is running and I turn the jake on and off switch to the on position it causes the check engin ...engine brake and cruise not working on 06 w900 cummins isx 475 replaced clutch switch and speed sensor , showing open circuit on clutch switch, ck pins at ecm to clutch switch its good any thoughts. thanks why me, May 22, 2011. why me, May 22, 2011 #1. Trucking Jobs in 30 seconds.Reduced Noise: Exhaust brakes produce less noise than Jake brakes, which makes them more suitable for use in residential or other noise-sensitive areas. Easier to Install: Exhaust brakes are easier to install than Jake brakes and transmission brakes because they do not require any modification to the engine or transmission.Jan 13, 2020. #1. I have a 2006 Kenworth t800 Heavy Wrecker with a c15 CAT we just picked up and the jakes are not working at all. When you flip the switch the retarder light comes on and the switch has power but the jakes do not work at all on any stage. Pulled the valve cover and inspected the harness and no chafes or broken/unattached wires.Mar 16, 2023 ... CUMMINS ISX INTEBRAKE (engine brakes)! HOW THEY WORK! ····. 6.7K views · 1 year ago ARIZONA ...I have a 2006 volvo with Cummins isx. My 6 stage engine brake is weak. Wont holf me even on high while am empty. I thought a valve adjustment would fix the problem but it didn't. Did overhead adjustment yesterday. No change. It only has 2 jake brake selonoids which we didn't test. Any insight? ThanksOk, thanks. Technician: Nich M. Here is the Cat diagram.I noticed that not everything is thoroughly labeled on the Peterbilt diagram. You may need both.I would make sure that the clutch and brake circuits are both grounded at the ECM. After that check continuity on the jake circuits from the switches to the ECM.The Jake Brake is most effective at high RPM, the only thing that running down to idle speed on the jakes does is make noise, the jakes have very little retarding effect at low engine speed. ... i have a 94 freightliner with the 3406 cat that the jake isnt working. It appears we are not getting an output from the ecm to energize the jake relay.

The Jake Brake is powered by a terminal on the car's ignition switch. The electric charge helps engage the Jake Brake whenever the button is triggered. A circuit breaker or a 10-amp fuse is used to safeguard the circuits against overloads and other dangers. If you want to know the fuses I used, check this fuse assortment kit from Amazon. As a user, one …. Sw jogging path

11. Location:Los Angeles. Posted January 20, 2013. Happy Sunday to all, I am still working on this Mack E7 (ETECH) 350 HP with Jake Brakes. The cylinder head has been replaced, the valves have been adjusted as well as the Jakes, however my current issue is the Jakes. When driving down the road and the Jakes are applied, there …My 4cyl jakes act like they don't turn off when you hit the accelerator, clutch or even turn the switch off. They sound like they keep running for a few seconds after they should have cut off completely. 2cyl jakes work fine. Need to find a solution quick as this is my main rig. Thanks.Join Date: Dec 2011. Location: Mount Holly NC. Posts: 134. Jake brake not working. We are traveling from NC to MA and left electronic schematics book at home. I can't find the fuse/relay location. Checked the fuses in the panel outside on drivers area as well as 12volt panel in engine compartment drivers side and nothing is labeled Jake brakeThe Jacobs' Engine Brake, or Jake Brake, is an essential component in slowing and controlling your vehicle. By using the superior retarding capabilities of ...The Jake Brake is powered by a terminal on the car's ignition switch. The electric charge helps engage the Jake Brake whenever the button is triggered. A circuit breaker or a 10-amp fuse is used to safeguard the circuits against overloads and other dangers. If you want to know the fuses I used, check this fuse assortment kit from Amazon. As a user, one may be concerned if the Jake Brake can be ...working on a cummins isx15 engine serial number 79779054 jake brakes are not working not getting power to the solenoids ohm on solenoids are 10 ohms need wire diagram from ecm to to the ... inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent. Tory Johnson, GMA Workplace Contributor, discusses work-from ...Problem 3: Inspect the Wiring System. Burnt or cut with the wires can make your exhaust brake not work. So ensure you have checked the wires and find them perfect. Checking the wires is simple; remove the fuse box and inspect the wires on the back. Check the entire wires from start to end and ensure no wires are damaged or burnt.Technician: Mike Mcmillan. It is possible yes. The engine brakes will not kick on if the idle validation states on, The cruise will still work and you will not notice any performance effects on the truck. This signal is telling the engine that the pedal is all the way up. Ask Your Own Medium and Heavy Trucks Question.4 positions. All the way up is off. Pull towards you one click that's the cruise brake. You set it with the button on the end of the lever to automatically engage at a preset speed while the cruise is on. The speed setting will show in the dash display when activated in cruise brake mode. This mode will also engage the jake when you step on the ...Since the Jake Brake ® was introduced in 1961, we have been a partner in the trucking industry’s quest for safe, reliable, and efficient commercial vehicles. Today, over 10 million Jake Brakes have been sold globally, and now the Jacobs Engine Brake ® has a new home at Cummins. As part of the Cummins family, we will continue to supply you with …Check your fuse panel diagram. There will be a fuse that is marked Engine Brake. Pull it out until you get back to a shop and get it checked or if its pretty easy to get the dash off where the brake switch is, just take it off and pull the plug off the jake brake. justa_driver, Apr 30, 2014. #2.#1 · Oct 9, 2011. Have a 1995 379 Pete w/ a 12.7L 60 series detroit. Jake brake and cruise control doesn't work. There is power to dash switchs for jake and cruise. Power to the …Hi, I have a 2000 37' Tradewinds. We took it out over the weekend and found that the Jake brake is not working. The RV is new to me and have not gotten completely familiar with it. Until now the jake brake worked great. It didn't this weekend. I would think the 1st thing to check is the fuse ( assuming there is a fuse).my jake brake isnt working Cat CT660 JA: Im sorry to hear that your jake brake isnt working on your Cat CT660, but the truck Mechanic will be able to help you with this issue. ... On our 2003 k104 with a cat c15 6nz, we have low engine brake, no medium and low on high. We have swapped engine brake controllers with another truck and this has not ...These vehicles require high braking force. Because of the weight, it's hard for service brakes to stop the vehicle quickly and safely. ... Here is a diagram of 4 strokes diesel engine working without the Jake brakes: ... As you can see the 2nd stroke is not the same. Jake brake opens the exhaust valve during the 2nd stroke or compression ...amishdonkeys Discussion starter. 247 posts · Joined 2009. #1 · Oct 9, 2011. Have a 1995 379 Pete w/ a 12.7L 60 series detroit. Jake brake and cruise control doesn't work. There is power to dash switchs for jake and cruise. Power to the clutch sensor. Clutch sensor was tested and checked out OK.speed sensor new, brake pedal switch working , brake air pressure sensor working one next to clutch pedal on the fire wall , clutch switch working , engine brake working ,speedometer working , cruise will work when the truck is parked,will not work when in motion Controls for the cruise, of, on, resume, + and all working when parkedWhen you flip the switch the retarder light comes on and the switch has power but the jakes do not work at all on any stage. Pulled the valve cover and …The power then goes back to the cab switch for the high and low selection, then to the solenoids. That should be clear as mud. Power to the Jake switch can be off a relay that goes bad and a type 2 resets every time the power goes off. You want to test with a volt meter to check for poor connections..

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