Question about 2003 Ford Mustang

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Low beams only work sometimes

High beams OK. Low beams used to go on and off only when I used my turn signals. Now low beams are off most of the time. They only come on on rare occasions.Should I replace bulbs or switch? Or maybe its something else?

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  • doublemgs Feb 04, 2009

    Sorry Chuck 943,
    This is actually a 2004 Ford PU. I wasnt very savy when doing my initial input. Thanks anyway. I think you are on the right track for my PU as well. Will let you know.


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  • Ford Master
  • 783 Answers

Remove the plastic trim from around steering column so you can access the wires to the multi-function switch(turn signal switch).The RD/YE wire is the feed from the headlamp switch for low beams,it then leaves the multi-function switch on the RD/BK wire and feeds fuses no. 10 and 4 in the under dash fuse panel and from there to the headlamps right side is the DB/LG and left side is the WH/LG. Get you a 12V test light and make sure you have voltage in these places. I suspect that the multi-function switch itself has gone bad since you stated that they would work at times when you activated the turn signals.

Posted on Feb 02, 2009

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