Re: 2008 H2, DRLs not working, changed bulb, checked fuse
Hook test light to ground then start truck and put it in gear(you need to have dtrl's on to activate relay. also need to make sure bcm is commanding them on, BCM supplied the ground signal to the lamp relay from connector x4 pin 23. That's the black connector at the bcm
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1987 Jeep YJ 403hp sbc 653hp on NOS
1998 Chev Z71
2007 Chev Trailblazer SS
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