Re: DRL not working / All fuses, relays and bulbs good
Does the DRL relay turn on? Check for power at pin 86 of drl relay when in drive, engine running(with help of a second person) don't want it to drive away on you. Check for ground signal at pin 85 from BCM. Check for power at pin 30. If you have all those problem is from pin 87 to lamps or bad ground tp DRL lamps. I would suspect open in underhood fuse block from pin 87 to connector c4 pin b2 dark blue wire due to modification done over loading circuit.
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1987 Jeep YJ 403hp sbc 653hp on NOS
1998 Chev Z71
2007 Chev Trailblazer SS
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