Sequential turn signals blazer8/12/2023 ![]() The internal circuitry of the switch back will back feed with the white parking lights on causint the yellow turn to light up but no blink. One other issue i have ran into with full leds is when someone uses switch back leds in the front. When you turn on the parks the bright side lights up and you no longer can see the blink. The only other possible problem is that the led tails could be wired backwards for your truck.i have ran across 3 trucks so far where the wires for park and brake/turn are reversed, so when you plug the 1157 in they seem to blink fine until you turn on the lights. If you swap the two wires in the flasher it would work with any digital flasher. The problem is that led flashers (digital )a re polarity sensitive. I'm going to call United Pacific tomorrow, hopefully they can steer me in the right direction. Maybe there's something special about their flasher? The back of the package says that a United Pacific LED turn signal flasher item #90652 is required (funny how LMC doesn't mention that in their catalog) I looked up that part number on Summit, and it appears to be the same as the flasher I just bought, just a different brand. The flicker feature doesn't appear to be working, maybe that has something to do with the problem? The tail lights are manufactured by United Pacific and feature "sequential flash" and "Brake attention", which apparently means the lights will flicker one time when the brakes are applied. I installed an electronic flasher with a ground wire. I ran a jumper wire straight from the negative lead to the negative battery post, and crimped the running and brake light leads to the proper wires coming straight out of the fuse box. I cut the "socket" end of the tail lights off and hardwired it. I think I've completely ruled out a bad ground at this point. Doesn't look like the tail lights are the problem. ![]() ![]() Installed the replacement tail lights from LMC, same problem. ![]()
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