OK heres the story. We put a 5" down pipe back exhaust, boost gauge, pyro gauge, green keys & new rims & tires on a 07 classic lbz tonight. Started the truck a couple of times in the shop everything is A OK. Our buddy comes to pick up the truck, he starts and it gives a reduced engine power in the drivers display & when he hits the brake pedal the doom light goes on.:wtf: We didn't have a V2 down at the shop so I couldn't scan it for codes. I thought maybe the truck was missing the cat & popped codes like my LLY first did, but the pressing on the brake pedal & getting a doom light was just weird. Any ideas?

Did you leave any grounds off???

Did you leave any grounds off???


Didn't touch anything! It is like the brake pedal is connected directly to the doom light switch.

posessed truck!
May just be a coincidence. I would start with grounding.

check where you tapped power for the pyro control box.

pull the dome light fuse,then does it work?

I found the problem......there is a group of wires that run behide the pillar stock from the factory, power for the doom light, high mounted third brake light, etc. When I snapped the pillar back in place I pinch the feed that goes to the doom light with the feed that goes to the third brake light. They back feed on each other.
I'm a electrician by trade I should have known better!!!!

I just had to throw this in there is it dome light? or am i confused?

I found the problem......there is a group of wires that run behide the pillar stock from the factory, power for the doom light, high mounted third brake light, etc. When I snapped the pillar back in place I pinch the feed that goes to the doom light with the feed that goes to the third brake light. They back feed on each other.
I'm a electrician by trade I should have known better!!!!

At least you didn't need to take it to the dealer like you were talking about. you might have the same problem i am :)

I just had to throw this in there is it dome light? or am i confused?

:rolleyes: :D

:eek: oh crap not the doom light!

Wait.... I thought "reduced power" displayed was the doomlight??!!