Jake brake not working on high. Everything else on my Smart Wheel is working fine.
Jake brake not working on high. On a small hill I can feel the Jake slightly working when I turn it on. I thought low volts coming out of the ECM so I borrowed an ECM off a twin and got the same results. After retiring from teaching automotive classes for 30+ years I decided to create a blog about all the questions I used to get about brakes and anything automotive. Arwood. Dug into the schematic, gets power (indicator lamp comes on) located and feel the relay click Start chasing the wiring. Pulled the valve cover and inspected the harness and no chafes or broken/unattached wires. I did see about the actuator on the turbo can get sooted up. If the low setting works 2 cylinders and the medium setting works 4 cylinders and both solenoids activate all six cylinders if this is so then the electrical system for the engine brake is working properly. You need a Cummins shop that has the ability to access the Cummins ECM software. Any insight? Thanks The multimeter model I use to troubleshoot listed on the Amazon Affiliate Link listed right here: https://www. clutch and throttle still disengages jake. now it jakes no matter what all cruise functions are gone brake lights are not stuck on jolly valve and brake u can hear switch activate. The level switch closes a ground to the ECM for low and a separate ground for medium. I thought a valve adjustment would fix the problem but it didn't. Customer: Removed valve covers, Cyliders 3-4 jakes work on low. Nov 4, 2015 · With ISX 870 and newer the engine brake selection switch has absolutely nothing to do with which cylinders are braking or not. He has a new clutch switch , wire harness is good, new jake brake solenoid, new male plug on head harness, checked wires with ohms meter and was good, and after today putting on the plug on the head harness they wouldnt work then when moving the truck with 93 t600 Jake brake wiring diagram got 2 wires that fell off 3 way switch and not sure where to put them back on at. With nothing happening on high I would check the operation of the switch. No change. When the jake brake gets activated, it opens exhaust valves in the cylinders after the compression cycle, releasing the compressed air trapped in the cylinders and slowing the vehicle. I'm working on a 2004 Cat MBN C15. A. I have no power to the jake brake switch. I have read a ton of useful information on here already. High is basically low and medium together. It then got to the point that when you applied the jake brake pedal the only way it would work was when you toggled the switch from low to high. It can be used in combination with the foot brake. The jake brake has always given the driver trouble. What should I look for? Insite showed 33% on level 1 67% on 2 and 100% on 3 Sep 28, 2024 · The Jake brake is not a substitute for working service brakes, so you can’t rely on it entirely to stop your vehicle. Does anyone have any suggestions on what to do. I recently purchased my first dump truck which is a 1999 sterling at9500 with a c12 and Eaton 10 speed. The engine is a c13 Lee15325 truck is a 386 Pete vin 750952 I replaced the injector harness, put 6 new injectors in, and ran a overhead. In high both the low and the high are turned on (now all 3 brake housings). Nov 8, 2019 · The Jacob’s Brake is an extra tool available to a truck driver to utilize in particular situations. A circuit breaker or a 10-amp fuse is used to safeguard the circuits against overloads and other dangers. I’m getting a service engine light and wasn’t sure if this could be causing my Customer: I have a cat 3406b and the jake brakes are not working they are getting 12v from the switch and the actuators are moving when powered but the jakes are not working any ideas Answered by Cat Man in 28 mins 9 years ago Jul 21, 2013 · Posted 7/22/2013 06:15 (#3222250 - in reply to #3221023) Subject: Re: m11 cummins jake brake problem SE Nebraska, Near Misery and Cans Ass! Mine will do that when the ECM gets loaded with fault codes. Jan 25, 2021 · 2003 Monaco exec. I can run both solenoids off 1 pin or the other and they both will work. Thanks for any advice. Customer: I have a 379 Pete, the jake does not work. On my bus the brake lights come on when the Jake is applied (the brake lights always come on when the bus is telling the Jake Brake to activate). After closer inspection of the assemblies, I found one Customer: High idle cruise control and Jake quit working on a DD15 western star Cruise Control Mechanic's Assistant: Im sorry to hear about the issues youre experiencing with your DD15 Western Stars cruise control and Jake brake, but our truck Mechanic will be able to help you diagnose and resolve the problem. Used scanner and ecm recognizes low medium and high brake position Mechanic's Assistant: Is there anything else the Equipment Mechanic should know Oct 9, 2011 · Seemed to work better in the cold weather, after not working at all for most of the fall, lately they were working all the time, then the temperature theory fell apart this week during really cold weather, I lost them again, or only had 2 or 4. "Jake Brake", or "compression release brake", is a component installed on diesel engines that slows the vehicle without the driver having to apply the service (foot) brakes. 2 days ago · I have an issue with the jake brakes on this 870. The Jake brakes aren’t working and I would like to address this ASAP. If I reconnect the rear now the front will not work. Oct 5, 2020 · So, what is the purpose of a Jake Brake, and how does a Jake Brake work? Read on to learn more about Jake Brakes and tips on how to use them properly. I took it to Cummins and they said the brake was working fine at the engine. I installed a new switch and put both jake brake solenoids. In high both grounds are closed. I believe that the Jake Brake is working slightly. Dec 7, 2006 · As the Jake Brake is an added system to the engine, the DDEC only seems to deal with it as a function of Engine Overspeed (Engine Brake Engaged) or the Cruise Control (setting it up to keep the Jake Brake from coming on when you are following Anal-1 thru the hills in South Florida with the cruise control on :eek: Hey, I'm not making this up The Jake Brake's biggest advantage is preventing brake overheating, which will gradually inhibit the brakes from working properly, or stopping. Feb 25, 2017 · Re: Jake Brake not working #3 Post by TruckerKid » 25 Feb 2017 23:25 Another suggestion would be to re-buy the engine you are using after disabling an engine sound mod, if you were using one of course. ” Many cities pass laws banning the use of jake brakes due to the loud noises that the brakes emit. Sometimes when I got the button on the engine brake works, and other times it doesn't. They often offer to stop normal valve opening of 2 or more cylinders to retard the engine. also check the brake switch for the engine ecu this should be s seperate switch on the brake valve. Mar 9, 2010 · He is trying to fix the jake brake and its not working on a 2000 peterbilt c15 cat. However, make sure that when you use the Jake Brake, the engine is not cold. Thanks for the responses. Did overhead adjustment yesterday. Computer knows what is should be doing basically. Jake brakes are installed directly on diesel engines and are engaged by turning a switch on and releasing the clutch and throttle. If Cummins insite is showing that the chicks are engaged but they are not, I would take a very close look at the wiring harness between the ECM and the Jake solenoids. . So we put on a reman turbo. On high only banks 1-2 and 5-7 work. Although it will occasionally kick off for no Oct 1, 2020 · I need some help. I'm Arwood, but the grandkids call me Big Papa. When driving down the road and the Jakes are applied, there is a delay (long) or Jul 17, 2022 · Good Day Gents, I need some help with a Freightliner with a Detroit Series 60 engine please. We are going through brakes at an alarming rate without that good 3rd stage jake. If I go to level 1 or 2 it feels exactly the same. amazon. Cruise works I can set it at idle and raise rpms. and the jake brake worked but it was very weak. The front is for the front 2 cylinders the rear is for the back 4 cylinders. It should be operating at normal How do Engine Brakes on a Freightliner Work? An engine brake or a “jake brake” is a compression brake used in diesel-engine trucks that automatically slows down the truck without using the brake when activated. If the resistance not between 9 and 12 ohms, go to step 5. Cat C15 jake brake question Oct 20, 2020 · In order to troubleshoot a 2535-6 or 1073-6 diagnostic code, use the “Compression Brake Med/High Override” on Cat ET. When you select position 1, you are requesting 33% engine braking load, position 2 is 67% engine braking load and 3 is 100%. If one stops dumping oil the other is bad. Jan 28, 2012 · It's not self correcting. The middle bank does not compress the Jake slave pistons. This provides a retarding, or Nov 18, 2018 · I have an older model E7, mechanical motor with a 2 stage Jake. Glad it's still under warranty because the entire top-end had to be replaced Jan 1, 2022 · jake brake not working i have all of my keys binded but my jake brake have no sound of effect on truck light comes on but nothing happens < > Showing 1-5 of 5 comments Aug 18, 2021 · I have a CHR 94 model with an E7-400 motor that I cannot get the jakes to work. When I check the relay that connects the engine brake control module to the dash switch and clutch switch all poles have power on them The Jake Brake is powered by a terminal on the car's ignition switch. It only has 2 jake brake selonoids which we didn't test. What Do ‘No Jake Brake’ Signs Mean? When driving on smaller highways and interstates that pass near residential areas, you may notice signs that say “No Jake Brakes Within City Limits” or “Engine Braking Prohibited. Is this my problem?? Mechanic's Assistant: What's the make/model/year of your truck? Engine type? Customer: 2000 Peterbilt 379 ,C-15 caterpillar Mechanic's Assistant: Are you fixing your truck yourself? What have you tried so far? Oct 29, 2020 · High Stepping said: ↑. Any suggestions would be great. I turn it on nothing not even a indicator light on dash comes on. I took off the valve covers, checked the wiring and put a new tune up kit into the brake. Jake suggests the brake be rebuilt at 150,000 miles. The Jacobs Engine Brake is a diesel engine retarder that uses the engine to aid in slowing and controlling the vehicle. Manifold pressure is down as well but I believe its a sensor because the truck is running good. Apr 23, 2024 · Truck is brake to Jake via computer which was working fine cruise worked high idle. 06/2002 1FUJAPC943DK67814 engine DD06R0692264 The issue is the idle up does not work and Jake Brakes worked … Jun 9, 2010 · If you haven't done anything with the Jake you may want to install the Jake overhaul kit. What should I look for? Insite showed 33% on level 1 67% on 2 and 100% on 3 Dec 5, 2018 · First and foremost – make sure your brakes are working! Test the Jake Brake at the beginning of each trip. If all is normal, then it could be an issue with either a faulty valve or something more serious such as worn brake Jul 1, 2016 · Confirmed the computer is seeing all switches working and high/med/low in Cat ET. Changed out all three sylinoids. Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, previously 4 years as a fulltimer in a '07 DSDP Jan 8, 2015 · A Jake brake™ is much more complicated than an exhaust brake, although the Jacobs Company does sell exhaust brakes. This is commonly used to prolong the lifespan of the service brake. Oct 3, 2013 · Hi, I have a Peterbilt 387 with a C15 500HP single turbo. Mar 25, 2016 · The direction of that air flow is determined by the electronic solenoid controlled by the computer. Everything else on my Smart Wheel is working fine. Turn the keyswitch to the OFF position. The conditions seem to be the same all the time I'm at highway speeds. Thanks in advance. The cylinder head has been replaced, the valves have been adjusted as well as the Jakes, however my current issue is the Jakes. It started working intermittently awhile back. The jakes work on the low side, but the high isn’t working at all. If the Jake Brake is only using 3 cylinders (low) there will be a pronounced and rapid vibration for a couple of seconds at that 1,000 rpm point, just before Jul 1, 2016 · Also not sure how that could be as stage one controls the center jake and stage 2 controls the outer two jakes. Hit the switch to level 3 and you can hear the jakes come on but very very weak. com/gp/product/B0002YFD1K/ref=as_li_tl? Jun 7, 2008 · not to hijack, but my 07 6. Sep 18, 2019 · If the Jake Brake is working on all 6 cylinders (high) there will be no noticeable vibration as the engine slows to 1,000 rpm (at approximately 15 mph in 2nd gear) where it will disengage. Make sure you check the pressure in both the brake system and the engine for any discrepancies. Also, the Jake Brake works best on dry roads, in normal weather conditions. Nov 16, 2022 · A jake brake is also known as a compression release engine brake. also testing verified voltage to the Jake solenoids in case you might have some bad solenoids or potentially bad ground. Pull the three wires off the jake housing's and connect a hot wire to them one at a time to isolate which valve cover to take off. Aug 9, 2011 · My Jake brake on high was like throwing an anchor out. The pedal wouldn't fully release and this caused cruise and jake to not work. Sometimes the solenoid will stick or get debris inside and needs to be cleaned up. I have never wrenched on a CAT, just Detroits. V Jul 20, 2014 · I have a 2006 volvo with Cummins isx. I hooked up insite to the truck but there was no codes for jake brake. Turns out all the bridges broke on my heads and the valves weren't re-routing the exhaust properly. Nov 29, 2011 · Jake brakes have been working fine and they were working tonight when I came off of Monteagle Mountain but now they will not come on and work on any one of the 3 stages. Wont holf me even on high while am empty. What Is a Jake Brake? As briefly mentioned above, a Jake Brake is an engine brake that uses the engine to slow down a semi-truck rather than using the traditional service brakes. I have cut the truck on and off made sure the clutch and brake switch was working correctly. 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. Oct 8, 2016 · 2 stage engine (Jake) brake not working settinsail: Class A Motorhome Discussions: 1: 10-01-2015 05:32 PM: Jake brake not working: robisinwa: Cummins Engines: 9: 03-04-2015 08:07 PM: Jake brake not working: robisinwa: Monaco Owner's Forum: 10: 01-09-2015 07:19 PM: Jake brake not working: Ramrod: Cummins Engines: 6: 08-14-2011 09:57 AM: Toad Aug 10, 2011 · My Jake brakes were working good then they suddenly got week. If the resistance is between 9 and 12 ohms, Go to step 3. Jul 23, 2016 · I am not a mechanic and don't claim to be one but I had a 379 years ago that did this same thing. Related Article > Critical Mountain Driving Tips For Professional Drivers How I Use the Jake Brake. So if they both work then how could stage 3 not work because it just combines the two. Aug 27, 2021 · WELCOME TO GASDIESEL GARAGE AS I SHOW TO REPAIR THIS COMMON PROBLEM WITH THE ELECTRONICALLY CONTROLLED JAKE BRAKE SWITCH ON THE 2020 FREIGHTLINER CASCADIA. My Jake brake isn't working. This is a simple explanation of how jake brakes work. 7L (195,000mi)when I bought it the EB would not work, and it seemed lazy to spool at low rpms, so I figured the turbo wasn't moving all the way closed for off idle response, and eb function. 3 days ago · I have an issue with the jake brakes on this 870. Still no Luck. There is no exhaust brake micro switch on the computer controlled trucks. Hi my name is***** be glad to help. :thanks: Sammy Position 1position2 combines the Jake on two of them position 3 uses all three heads at the same time for the most stopping strength the Jake brake is not designed to work on glare ice and this is where guys get into trouble and make their mistakes because they create themselves a jackknife situation it works fine on snow it works fine on wet May 7, 2023 · Jake Brake Not Working on High . then it stopped working period. Are there more wires under there I need to check? Aug 5, 2019 · Jake brake problem on Cummins ISX. Leave on all the time; Flip on the switch as needed Jan 20, 2013 · Happy Sunday to all, I am still working on this Mack E7 (ETECH) 350 HP with Jake Brakes. May 16, 2020 · There are 2 solenoids under the valve cover. The jake is controlled by the ecu and the brake switch for the jake signals the ecu and I believe the ecu Jan 13, 2020 · I have a 2006 Kenworth t800 Heavy Wrecker with a c15 CAT we just picked up and the jakes are not working at all. There are varying schools of thought on ‘how to use the jake brake’ in a truck. Oct 10, 2013 · 1) How do I check that the jake brake solenoids are receiving power to make sure that the electrical portion of this system is working properly? 2) How do I bleed the system? any help at all will be much appreciated Jan 22, 2019 · My middle jake brake won't turn on at all and high doesn't work to well I believe that's tied into the medium setting not working. sometimes too much braking and I would switch it to low. It is an engine braking mechanism installed in a large diesel engine on semi-trucks. Cylinder 1-2 and 5-6 work on medium. Cruise works fine while even when the brakes are not. All it was was the spring on the clutch pedal. Jan 24, 2019 · Hi, I’m new to this site. When activated, the engine brake alters the operation of the engine’s exhaust valves so that the engine works as a power-absorbing air compressor. I have a brand new Pete, the Jake's stopped working at 60k miles. 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. Now sure if the TC locked or unlocked as anything to do with this. Voltage to ECM is good, grounds are good. Jan 21, 2019 · to do this turn the ign on (dont start) press the pedal down and then up three times and then turn the ign off the pedal is now calibrated. I have my jake Brake book, only talks about problems with the Jake Brake not working. I took the valve cover off and the power wire was broken, replaced the wire, and still nothing. The overhaul kit p# 4559-31180 updates the Jake to current revision level and includes reset screws, springs, control valves, most of the snap rings, and solenoid o-rings. Cummins ISM 500 with 2 stage Jake Brake. So each solenoid will work as long as the other is not plugged in. It seems to slightly work in HIGH or LOW. Apr 25, 2017 · If you are using J-48671–10, measure across Jake Brake 2 pins. The electric charge helps engage the Jake Brake whenever the button is triggered. jakes are working in low med and high however doesnt hold you back. Watch oil flow change from top of slave piston housing, when wire is removed or hand is taken off center of solenoid. Mike Mcmillan Volvo/Mack Master Tech, Certified with Cummins, Eaton, GM, Hino, Detroit Diesel Sep 21, 2018 · I have a 06 century Detroit series 60 jake brake stopped wrking an now I’m seeingfault code for brake open but cnt seem to find any info on what that code means so I figure gotta be with jake brake any ideas on where to start Dec 3, 2006 · My friend has a C15 CAT and says the Jake engages properly, but is late to disengage. Feb 11, 2017 · So my turbo engine brake is not working on a consistent basis. My 6 stage engine brake is weak. Feb 12, 2022 · So, the compression brake quit working on my 04 Windsor, with 400 ISL. If your Jake Brake isn’t working on high, it’s likely due to a problem with the air pressure. The Pete is a 379, 2002 with a C15. xfset otwl jwtqutub gvcojek wcipokh sqjxx dcrbwi ijbbqj bpmmkbpb dsmh