Got the new taillight socket pigtails in today, and started by replacing the driver side first as it's the one that was giving me trouble on the trip home from Mississippi. Staggered out the cuts so the crimp connectors would fit back in the flex loom, and used the nice ratcheting crimpers to really squish 'em tight.
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Hooked the taillight back up and it doesn't work. At all! WTF.. pop it back out and flex the connector around and it still intermittently starts working again! So I start trying with the other circuit boards, because clearly the brand new connector isn't the issue. So here's a 1 minute video with 3 circuit boards. Brand new TYC, old Motormite (Dorman) that was on the truck when I bough it, and a 31-year-old GM (from Sierra Red)
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So I said F it went ahead and put both old GM boards from the other truck into this one. How did TYC circuit boards become garbage? The previous set I bought are still working fine in Sierra Red..
Anyway so the left turn signal is still intermittent. I start poking around and remembered, oh yeah, it has a trailer harness T connector. Popped that out and one side of it has corrosion all over the pins (the side mating to the taillight harness.) Signal good at the harness end from the truck at the frame rail end. Shot some DeOxit in the taillight harness socket, and trashed the trailer harness T.
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Now the lights are working...or are they?
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Yep, except the left turn signal is still flaky! However, the 4-way flashers ARE working fine. So on that evidence, I went in and started cranking the steering wheel a little bit, and wouldn't you know it, the left turn signal would intermittently begin working correctly, then start hyperflashing again as the rear lamp would quit. F'ing turn signal switch is bad. For another day..
Richard