Fog lamps not functioning

03yukXL · Apr 3, 2023

Hey all,

I replaced the destroyed fog lights in my 03 Yukon. They still do not function. Fuses are good, swapped in a known good relay. led indicator comes on the dash when the fog light button is pressed. Is there a common fix for this? I have read a couple of common complaints but never saw an answer…

Thanks all

RST Dana · Apr 3, 2023

03yukXL said:
Hey all,

I replaced the destroyed fog lights in my 03 Yukon. They still do not function. Fuses are good, swapped in a known good relay. led indicator comes on the dash when the fog light button is pressed. Is there a common fix for this? I have read a couple of common complaints but never saw an answer…

Thanks all

Didn’t you check voltage at the bulb? Did you replace with LED bulbs by chance? If so, flip them 180 degrees.

Joseph Garcia · Apr 4, 2023

^^^x2^^^ Let's start by confirming that you have 12 volts at the bulb sockets when the fog lamps are turned on.

Fless · Apr 4, 2023

The bulb sockets also overheat and can be replaced with a new pigtail; you'll probably see the brown plastic when you have access to the bulbs.

03yukXL · Apr 5, 2023

Full disclosure, both new lights were bad from the factory. Kept the housing and replaced the bulbs with LEDs. All functioning now. Careful what you get on amazon…

S33k3r · Apr 6, 2023

Out of curiosity, where did you get the replacement bulbs?

Fog lamps not functioning

03yukXL

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RST Dana

Joseph Garcia

Fless

03yukXL

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S33k3r

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