Hey all - I got this 1991 Chevy Silverado C 1500 V6 4.3 L for free as rats had an amusement park near it. It runs great 180 k and fixed all electrical issues But Can Not Figure Out Why the Running lights Don't work --rear or front --All Else is good.. R&R'd relay and bulbs work --no voltage to rear lights at harness -Fuse ok. ???? Ideas as I am a savoy person on electrical