Passenger upper taillight bulb does not flash.
On my 2015 K2500, when I turn on the right turn signal I get the warning on the dash saying there is a failure. The bulb still lights up as a running light, and the driver side works fine. Is there something knocked loose under the truck, or am I in for some sort of electronic headache? Thanks.
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Re: Passenger upper taillight bulb does not flash.
It’s a dual filament bulb. One filament for the running light, another for the turn signal/brake light. Most likely one of the filaments is burnt out. Replace the bulb and see what happens.
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Re: Passenger upper taillight bulb does not flash.
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Re: Passenger upper taillight bulb does not flash.
Tests confirm that I'm getting power to the socket in all 3 wires, and the bulb is just fine, but yet I'm still getting a failure reading, and the bulb isn't flashing. This doesn't make any sense.
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Re: Passenger upper taillight bulb does not flash.
1 wire should have power with the running lights. 1 wire should have power with the brake/signal lights. 1 wire should be ground.
The running light wouldn’t work if ground wasn’t present. Is it a wedge 7443 bulb? |
Re: Passenger upper taillight bulb does not flash.
I think I've figured it out. It appears the contact that makes the turn signal/flasher filament work in the socket got mishapen somehow. I am now on the hunt for a new socket. All I can find on the internet is license plate bulb sockets, and LED conversion sockets. I'm hoping I can find 2014-2019 wreck, I can cut a socket out of and splice into my harness. I'd rather not have to pay GM for a new rear light harnesses, when the rest of mine is fine. Thanks for the advice everyone.
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