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I have a 93 F-250 with 95,000 miles. About 2,000 miles back I lost my low beams & replaced the light switch with an aftermaket replacement. This first replacement lasted for less than 1,000 miles, so I replaced it with another aftermarket replacement, same deal, short lived.
I then replaced the switch again using a motorcraft switch, and at the same time replaced the wiring harness socket with a pigtail replacement sold by Ford.
This combo didn't last any longer than the first 2 replacements.
Are you replacing the switch on the dash or dimmer switch. If the dash switch sounds like a weak ground causing it to run hot and burn up the switch. A fix is make sure it has a good ground, also you can go to the TECH ARTICLES which show how to wire up to your headlights using a headlight relay.
Thanks Duane,
I'm dealing with replacing the dash switch ( the hi/low beam switch is new ). I'll check for grounding while replacing the switch.
These switches apparently run hot and tend to cook the wiring harness socket...is why Ford offers the pigtail replacement to splice in. I just would expect the replacement parts to last longer.