Long time Tahoe owner, new to thread. original owner of 2002 Tahoe Z71. I've seen threads about the rear wiper arm skipping when fog lamps turned on. Neither fog lights or rear wiper work at all. All fuses good and replaced relay, switch and bulbs. No indicator light at switch. The rear wiper fluid pump operators fine. At a loss. Any advice or recommendations are greatly appreciated. rear defroster seems fine.