Brake light issue, stumped.
My LED high mount brake light quit working. The regular brake bulbs work fine in the tail light assemblies. Removed LED light, tested it on a known 12v source and it works fine. Found nothing obvio...
Forum Discussion
FIRE UP wrote:
Hey SML,
Well Sir, this is something should happen to me. I have "Weird" issues more than most. Anyway, I think most of the answers you've received so far are good. I don't know if you read my thread on my wiring issue we had while on vacation. It was the J-1939 Data link that went south and killed ALL of my gauges, exhaust brake and cruise control. Well, extra long story short, it was a broken wire.
And, where was the break? Well, without a doubt, we, my son and I got seriously lucky in finding it. It was a bad crimp, on a pin, inside a Deutsch connector, that was rigidly mounted to a support bracket, above the air dryer.
Now, what does all this mean to you? While about 95% of the electrical problems on 95% of the autos/trucks/RVs/submarines/space ships etc. have lead to a bad ground, some are other problems. And, it is possible, that you may have a "broken" wire, just inside a connector some place along the line from the original connector to the brake light switch, exhaust brake link, or where ever it originates from. Hopefully it's going to be simple to repair.
"Tracing" a wire in these beasts is way easier said than done. Surely let us know what you find out.
Scott
Scott, I just spoke to tech support at Country Coach and they advise there is only one brake light circuit and the center light is normally fed from the driver's side tail light assembly or both tail lights for redundancy. Since both the brake lights work in the tail lights, that reduces the possibility that I have a broken wire/bad connection coming from the front of the coach. My issue must be in the back and I need to do more investigation. My observations yesterday indicate the wiring is good but there is obviously something I have yet to discover.
I did have my coach into the local Cummins/Onan shop for a full chassis service recently but they had no tasks inside the engine bay other than replacing the serpentine belt and filling the tranny with Transynd as part of the tranny service.
My back up plan is to isolate a brake signal wire at one of the tail lights, tap into it and run a new wire to the high mount light.
