General Boards > Technical Support
Pac Brake not moving
Larry and Heidi Lee:
Thank you Gerald, I have saved the information to my cell phone and computer. I gave tech support a call and was told to test the Pac brake again at 1500 RPM. I am certain it won't work because I nearly killed myself going down a 7% 8 mile grade the other day... ??) The Ebrake never engages. No information from tech support as to which relay to check or any other electrical info. Any assistance in this area would be appreciated. ::)
Paul Schwalen:
We have an 03 Contessa with 370 Hp Cummins and recently had the Pac Brake fail. It turned out that the brake had frozen and would not work. Cummins said that they managed to free it up to test it but that they also said that it would continue to freeze up. The answer was to replace it and that is what we did. The new brake works better than the original due to some changes in design. Good luck with your problem. :)
Richard And Babs Ames:
One note about PAC Brake is to use them. Ours is on 95% of the time and we have not had a problem in close to 10 years.
Joel Ashley:
Don't know if this will help, but you asked for electric info.
Our '06 Monterey 36 ft. shows relay K9 in the forward 12v. electrical bay as the Exhaust Brake Solenoid one, with K6 (E991 Retarder) relay between it and the engine ECM module. The "Exhaust Brake Engaged" dash lamp wire splices into wire 204 between K9 and the Exhaust Solenoid, so taking what Gerald and Richard have said into consideration (engine RPM and transmission), if that lamp turns on at adequate RPM and gear, one could infer a liklihood that the problem was between the solenoid and its ground or the valve itself, not in any component before it.
I agree with Richard also, and have read elsewhere the same philosophy, that using the exhaust brake is the best way to prevent "freeze-up".
Larry and Heidi Lee:
Hi Joel and fellow Beaver's, thanks for your responses. The "exhaust brake" light does illuminate when the switch is toggled so I suspect a mechanical failure of some sort. I appreciate the elecrical information and will take a look at the relay and ground points. I have the coach parked at a friends gigantic :) indoor 8 bay residential shop (every mans dream) so I will be working on it over the next few weekends and will update everyone.
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