Dennis Garris

I posted the following earlier today in the "Ask A GM Technician", I hadn't received a response (wasn't sure how that worked) however I did one more google search, a guy suggested clearing the codes. OK I have tried everything else, I scanned but no codes, I did a clear codes anyway, but didn't check the turn signals since no codes. I started to take to local shop and checked and its now working, maybe because the turn signal relay was replaced and that had caused something weird...? I really don't like not knowing what the solution was unless that was it, I am a network engineer and need logical explanations! JUST an FYI and comments are welcome. " New Member 1 Posted 2 hours ago I have confirmed power from the turn signal switch, but no power at rear drivers turn signal or at the junction box below the cab, Checked all fuses, all other turn signals work correctly. The original problem was drivers dash turn signal indicator was fast flashing, thought bulb, after trying new ones then read could be possible turn signal relay, installed new one, this got rid of fast flashing indicator but still no rear turn signal. Truck is not driven in bad elements, under neat is clean, don't see any loose or even grungy wiring, I am a car guy and keep all my vehicles top notch....any help is appreciated.

Update, I was ready to take to local shop to figure it out, one last forum comment was to clear codes on computer, I did a scan, there were no codes, but did a clear anyway. Didn't check turn signal then, but when leaving for the shop, checked and it was now working.....I really don't know, could that have fixed it ? Very strange indeed.....nothing else other than testing at all the points from the light, junction box and turn signal switch, otherwise just that clear codes.

I have confirmed power from the turn signal switch, but no power at rear drivers turn signal or at the junction box below the cab, Checked all fuses, all other turn signals work correctly. The original problem was drivers dash turn signal indicator was fast flashing, thought bulb, after trying new ones then read could be possible turn signal relay, installed new one, this got rid of fast flashing indicator but still no rear turn signal. Truck is not driven in bad elements, under neat is clean, don't see any loose or even grungy wiring, I am a car guy and keep all my vehicles top notch....any help is appreciated.