67 Mustang Fog Light Wiring - Vintage Mustang Forums
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post #1 of 4 (permalink) Old 08-18-2019, 01:42 PM Thread Starter
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Confused 67 Mustang Fog Light Wiring

I'm a new member and own a 67 "S Code" Mustang Fastback:
I purchased a Fog Light add on kit from Mustangs Unlimited, (never again...) and now that I have the correct parts, (I hope) I'm a bit confused on the wiring... I received 4 separate wiring harness' "firewall to to fog light", "fog light feed harness under dash", "fog light ground harness", and the "fog light switch & bracket"... I also purchased the "fog lamp circuit breaker wire kit"... Can you all help me figure out how all this comes together? Neither CJ or Mustangs unlimited seem to offer a wiring diagram and/or schematic Much appreciated!
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post #2 of 4 (permalink) Old 08-18-2019, 01:59 PM
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The wiring is shown in the 67 wiring Assembly Manual.

In general, the circuit breaker kit mounts on a bracket next to the fuse box. Power feeds to it. The switch mounts under the dash. The fog light feed connects between the CB and the switch then to the firewall. The firewall feed goes from the firewall to the lights. My 68 didnt have ground wires, but I would assume they go from the lights to an appropriate ground.

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post #3 of 4 (permalink) Old 08-18-2019, 08:23 PM
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My 67 GT with factory fog lights has the circuit breaker mounted on the wiper motor bracket. Fog switch mounts in pre drilled hole way under sorta under where ign switch is.
As for wiring, I'm still using my orig main under dash harness which is for GT & fog lights.
So not sure what's the "add on harness kit".

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post #4 of 4 (permalink) Old 08-18-2019, 09:19 PM
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Or, if you're handy with wiring and want the fog lights to work only with the parking lamps and headlamps, and automatically go out when switched to high beams, like they do in newer cars to meet FMVSS then here's a wiring diagram for you...
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