General Boards > Technical Support
Pacbrake exhaust brake need relay location
Joel Ashley:
As you know, the C9 uses a "Pacbrake" instead of the internal compression brake used on larger models. It's commonly on our rigs made by Jacob's Systems, but is for all intents a twin of the original Pacbrake. Before I'd get into the electrics, I'd check the cylinder operation and whether the butterfly flapper moves freely; they often seize from lack of regular lubrication. Also see that airlines aren't leaking and the solenoid hasn't corroded up, or wires failed there where heat and exposure is greatest; kudos for having already found the solenoid. I keep a bottle of lube and try to remember to apply it every so often as prescribed, usually at least prior to or after "storage" periods. I believe there may be a guide to lubing in the brake section of Coach Assist. Also of course is the common oops of having both the exhaust brake and cruise control switches on at the same time.
Joel
https://www.youtube.com/watch?v=9QxZhk_CUB8
https://pacbrake.com/superlube-exhaust-brake-lubricant.html?gad_source=1&gbraid=0AAAAAqs6Wyd1ZS1QKcilDLjT_0gFaYVF_&gclid=Cj0KCQiA0--6BhCBARIsADYqyL9m0bmU9wRLim4-GVW24NKT144Bm4EihrDLjNyF_Q8iZgioHog-F4saAkm-EALw_wcB
Steve Huber:
Joel,
On the 07 the exhaust brake works with the CC on. Makes driving a bit more convenient. Only downside is that with the exhaust brake on the power steering will sometimes "buck" at slow speeds as noted in previous threads.
Steve
Bryan,
If you haven't, suggest you print pgs 2 & 4-7 of the 07 Contessa wiring diagrams (relay & fuse location and fuse ID info). Put them in plastic sheet protectors and leave them in the forward electrical bay. (I taped pg 2 to the inside of the bay door). Saves a lot of hassle when you need to check on a fuse or relay.
Steve
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