
New owner!
Hi guys! Brand new 2001 C5 LS1 4L60E owner here. Been working on JDM/Motorcycles but never any American stuff. Specially with a big ol v8. I started working on a Cherokee and the deal on this rat chewed Vette was too good to pass up.
Anyone know how many harnesses there are and which controls what?
Rats got to the harness and not really sure which harness is which and what it does. I know I need an “engine” harness and probably a “front”? harness, as the headlights do not work at all nor does the ABS or any active component pertaining to traction and suspension control and so far with the research I’ve done, its tied with the headlight harness?? Also what’s the difference with the front ABS/EBCM harness vs the rear ABS/EBCM harness? Are they both needed or trim specific?
Also I’m currently firing 5/8 cylinders. Will do a leak down test asap and a compression test. But she sounds amazing and starts right up even on 5/8. Physically see chewed up spots on the driver side close by the 2 non-firing cylinders so it makes sense. Right passenger side was filled with toooo much pine needle to even see the harness.
With all that being said. Which harness should I replace first? The transmission harness seems to work fine. I’ve yet to test the brake lights and tail lights since I have no one to help me with that.
But I got every single light on the dash and the only codes I consistently get are these two: P0300 random / multiple cylinder misfires and P0481 for the fan 2 control.
Any help would be greatly appreciated!
TLDR: Need help prioritizing which harness to replace to get the car running and driving and what the harness is.