Ok. I am working on this mustang. It is a 98 which is the body style from 94-98. Anyway here is the problem. The marker lights are not working. The blinker part of it works and its seems to have a good ground and we are apparently getting juice on the test light out of the marker light wire however the bulb does not light up. When we pull the headlight switch out to the first click where the marker/DRL should turn on it doesnt. Anyon know what the problem could be? I am thinking it is a bad switch or something. I checked all the fuses and they seem to be all in tact. Thanks for any help.

 

um did ya check the fuses under the hood?

 

As statedi n the first post we checked all the fuses.. under the dash and under the hood and all fuses are good and working... the fuse under the hood for DRL's is also the fuse for the horn and something else, i forget what but all other things are working that are associated with that fuse. we are drawing a blank. the only logical think we can think of is a bad switch and/or some kind of loose wire but idk.

 

one of the filliments in the bulb is burn out go get a new bulb and replace it

 

If all the fuses are good (I assume you tested them with a test light and not just looked at them) then I would say it is the switch too.

 

^+1...I had the same problem and I cleanedmy multifunction switch (or you may have to get a new one) and it cleared that up right away.