Originally Posted by chuckles_1205
Hey guys, first time posting a question here.
I have a 03 ' excursion 6.0.
My side mirror lights are acting strange, the turn lights (blinking) on the mirrrors work but the running (Park) lights don't work.
So I am thinking it is a wire issue or something like that, so does anybody have an suggestions what I should look at?
I'd pull the door skin off and pull the connector apart that goes to the mirror.
The brown wire is the park light wire. See if it has power when the lights are on. That should help you determine if it is the light module in the mirror, or a wiring issue.
The wiring for the park lights in the mirrors comes from the CJB, and is spliced to the license plate lamps and rear park lights... so if that splice is bad (very unlikely), you should have issues with those lights as well.
You could also disassemble the mirror and check for power in there too.