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Join Date: Apr 2011
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Re: reading schematic of fuse panel
There is a wire that runs from the fuse box taillights fuse up to the headlight switch. I think it is orange on a 66. This provides fused power to the taillights and parking lights. The parking lights and tail lights should come on when you pull the headlight switch out 1 position. When you pull to the second position, the headlights come on, but the parking lights turn off. This parking light scheme is for pre 68 only. The wire from the headlight switch to the parking lights is purple. It gets power from the orange wire from the fuse box. The taillights are fed from the same orange wire, but through the switch, they connect to the taillights via a separate brown wire. After the switch the parking lights and tailights are split into separate circuits fed from the same orange wire.
The power for the headlights comes from a red wire running from the 4 way connector or horn relay buss bar (depending on year). There is no fuse in that line and no fuse in the fusebox for headlights. The headlight switch actually has a circuit breaker in the switch to protect the headlight circuit.
Earlier I spoke too soon by saying your issue is in the forward light harness, it may also be located in the tail light harness or at the taillights themselves. I'm not sure that unplugging that connector will disconnect the tailights from the switch, so you can make that determination.
I blew this out quick from memory, hope it's 100% correct. Follow your wiring diagram and you should be able to make heads or tails from my post.
Last edited by DUTCH MAX HEADWORK; Aug 12th, 19 at 2:57 AM.