Funny you say power door lock switch. My left rear door lock works only some times? By some times i mean two or three times in the last 3 years. I thought it was broke and had it checked they said it was fine and one week it started working again then it quit again? It worked when that dash light fuse was blown though.

 

Bit time consuming, but pull the b pillar trim panel, and the door panel, and check the wires from the b pillar to the rear door. Could be some worn wires in the harness. The rubber boot takes a bit, but they come off. I find a hairdryer works for making them plyable again come install time.

Worth a check, easy enough to do both ( this and the jumper fo the insterior illumination circuit ).

 

I would be careful about using that dealer again, that is higher than list price.

Headlamp switch, f150, w/fog lamps, w/auto lamps - f150 1997-03, heritage 2004
MSRP : $148.91
Online Price : $73.71

 

What was the web site where you found the Headlamp switch for $73.71?

 

That is from Tasca Ford ( site sponsor ) : www.tascafordparts.com