Search results

Yes the ex brake disengages when the brake pedal is depressed. After doing real world testing I applied +12v to the k10 relay coil during ex braking and it did back feed and disengaged the ex brake. I then tested and found a single wire on plug J308 pin 7 that when you apply +12v directly to it...

Once again RONMAR you amaze me with your skills at reading wiring schematics. Just finished the test drive and you are correct pin 4 has 24v+ during ex brake engagement. Now to connect a 24vdc relay and hook it up to the brake lights. My initial thought was to apply 12+ to the trucks brake light...

Well I hear the solenoid latch when warm up is turned on but K16 relay does not light up momentarily and no voltage on pin 4. So I’ll have to get a passenger and go for a test drive to test the theory.

Sorry to bug you again, for testing the wires purposes it would be easier to do while parked versus driving and looking at a volt meter while the exhaust brake is working. Would I get the same voltage on pin 4 just by hit the warm up switch to on?

Thanks RONMAR. After searching the internet I get a lot of conflicting answers to that subject. Some motorhomes have it, some fire trucks have it but most trucks / Semis do not. Some say it’s legal some as it’s not! My opinion is it’s safer for me to let someone know I’m slowing down abruptly...

Thanks again ronmar, your amazing skills at reading these schematics are far superior to mine. I’ve been looking at the schematic last night and today and I’m still having a difficult time understanding what’s going on. My simple question (if in fact it is simple) is, is there 12v+or- or...

I finally made it back home and working on trying to wire the exhaust brake to the brake lights on my 2003 M1078. I’ve been in the fuse panel trying to track down the exhaust brake relay that activates the solenoid. The relay labeled exhaust brake only comes on for a moment when it is first...

I just finished my conversion to a full blown motorhome and with full diesel, full fresh water, full 50 gasoline tank for generator back up and all of our gear. I weighed in at 26,800 lbs and I have just driven about 1,100 miles in 10 days from Florida to central Georgia and it works great only...

That’s the experience I’ve seen. I hear it inside the cab but I’ve been watching for evidence of how load it is to people near by on side walks or bikes any time I’ve been near someone they never reacted as if there was no increase in noise. I kept expecting them to turn their head as if I blew...

Thanks I’ll keep that in mind.

Thanks, My mind was already going down that path of how I could make that happen. I’ve also discovered the second part is true. When cruise control is on a slight tap on the brakes disengages the cruise and starts the exhaust brake operation. I’ve also found if if I turn the cruise control to...

Well that sucks, how did you figure that out?

I have a 2003 M1078A1 the button labeled warmup/off/retard. I’ve just realized hope wonderful that switch is when switched to retard. That is how you activate the exhaust brake. I’ve never driven a vehicle with this feature and love how well it works and will save my brake shoes from excessive...