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Interior electrical help

XMAN JR

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Milton PA.
HI, my name is wayne & I am helping my dad restore his 67 gtx. When we turn the key on the interior lights come. The only way to shut them off is turn the key off or shut the door. Anyone have any ideas ? It doesn't matter where the light switch is turned to. Also the temp gauge goes all the way to the hot side. The tach goes to 4000 & stays there but that might be just a tach problem. Thanks for any help.
 
check and make sure the correct bulb is being used for the interior overhead bulb someone installed a dual filament in mine and crazy things happened check and secure all grounds
 
I'm confused....the interior lights should be on when either door is open. If you mean, "when we START the car, the interior lights come on" then you have a short (probably wires melted together...check the two multi-wire plugs going into the steering column) between the ignition "on" circuit & the interior light circuit....somewhere.... the headlight switch (dimmer part), steering column, bulkhead disconnect under the hood...could be any of several places.

Temp gage sounds like a ground problem. What ignition do you have? If it's stock, then the tach sounds like a tach problem like you said OR the tach feed is hooked up to something besides the negative of the ignition coil.
 
OK, got things figured out. On the back of the fuse box you can plug other things in. Someone plugged in a pink wire where it is hot only when the switch is on. I pugged it in a spot where it is hot all the time & I replaced the NEW flashers with other new ones. Now we have all the lights inside & out & they all work like there suppose to. The only lights that don't work are the reverse lights. We are thinking the switch is bad.
 
glad you figured out your problem, I was going to say check your fuse block as when I had some weird electrical things going on ('63 Fury) I found wires in the block touching each other with some worn away insulation/heat damage. Maybe by '67 they improved the box but the block on mine is tiny with wires crammed together even though there was all sorts of room to have a larger one. In any case a check of all the wires and connectors is a good idea...
 
Temp guage pegged usually means the sending unit wire is grounded completely. Is the tach at 4K when the engine is running?
 
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