Driver side front turn signal stopped working

JOHN OSTEN

MEMBER
2015 CHEVROLET TAHOE
5.3L
V8
4WD
AUTOMATIC
91,000 MILES

Brand new bulb (known good bulbs swapped in and out) bulb housing, still no luck. The hazards all work except the driver side front blinker.

Monday, June 20th, 2022 AT 3:42 PM

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

Hi,

The power for the light comes from the body control module. Do me a favor. Disconnect the connector at the headlamp assembly. There will be a blue wire with a white tracer that is the signal power supply. When it connects to the light, the wire becomes red. see pic below

Disconnect the connector and turn the left signal on and check for power to the blue/white wire.

Here is a link that you may find helpful:

https://www.2carpros.com/articles/how-to-check-wiring

Let me know what you find.

Joe

See pic below.

Image (Click to make bigger)

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Tuesday, June 21st, 2022 AT 3:58 PM

JOHN OSTEN

MEMBER
2 POSTS

Finally, I was able to get to testing voltage today. I found that I was getting voltage. I hooked my bulb holder with bulb up right out of the plug with some test leads and it was flashing fine. I then plugged the headlight back in and using test leads hooked the bulb holder to the terminals on the headlight housing to see the bulb flashes. I then examined the bulb socket terminals on headlight housing to see that one of the terminals was loose and not making a connection with the bulb socket. So, the terminal in the headlight housing was causing my problem.

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Saturday, June 25th, 2022 AT 11:22 AM

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

Hi,

Thanks for the update. I'm glad to hear you found the problem and were able to repair it.

Regardless, take care of yourself, and please feel free to come back anytime in the future. You are always welcome here.

Joe

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Saturday, June 25th, 2022 AT 8:53 PM