[dh114]

Hello everyone,

My wife has an '86 Mustang LX. She's having headlight problems- only high beams work. I've tried replacing the dimmer/multi function switch, headlight relay, and new low beam headlights without any success.

I'm trying to find a wiring diagram so I can troubleshoot the system or suggestions on what to try to get the headlights working.

Thanks for reading!
Danny

 

[dh114]

Hello,

Just thought I'd post a reply to let everyone know that I finally found a wiring diagram on autozone.com.

Hope this info helps someone.

Danny

 

[ImperialCrown]

Make sure that both low beam filaments aren't burnt out if you have voltage at the low beam headlamp socket terminals.

 

[dh114]

I have tried new low beam sealed beams. Didn't make any difference.

I have used my test light and there is no power to the low beam (black/green) wire at the low beam socket. There is power to the high beam wire in the low beam socket.

Have replaced the dimmer/multi function switch twice, replaced the headlight switch (the one to turn the headlights on), and also the headlight relay.

Now, that I have the wiring diagram I can hopefully trace the wire and see where it looses power.

Danny