Hey guys.
I swapped my A4 for an M6 along with changing to a same year M6 engine harness. Ever since, whenever I shifted into reverse, I would immediately blow the gauge fuse.

I have now unplugged the factory reverse plug at the trans and connected a new plug that I wired directly to the reverse portion on the A4 plug under the center console. It works fine now. I was just wondering what I maybe bypassing that would now cause this to work and is it safe to do? could it overheat, melt, etc?
Thanks for your time.



JD

 

If you look at the schematic, the wiring for the reverse lights stays inside the car after the fuse block on an auto. But on a manual, notics P110. That is the big connector where the engine harness and I/P harness meet. The manual wires go outside the cabin to the reverse light switch on the tranny, then back inside the cabin and to the reverse lights.

I don't have the 94 wiring handy, but maybe when you replaced the engine harness the wires for the reverse light switch were meeting up with something they shouldn't be on the I/P harness, and it was shorting out your guage fuse. The way you have it wired now is the correct way to wire the reverse lights.