I hope some can help here. My temp and fuel gauge peg out when I turn lights on, it's like abad ground but they work fine until I hit the lights. 66 gmc rewired with painless wiring, all is good but the light and gauge thing. Jeffrey.


I'm older than my truck but it's smarter than me! 66 GMC 3/4 ton fleetside 283, turbo 400.