Q: Headlights won't go off.

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Headlights won't go off unless I unhook battery. I replaced headlight switch still the same thing. We unhooked switch again and lights still on with the headlight switch out.
My car has an automatic transmission.

It sounds like you have a short in the wiring harness that goes to the headlight switch that is allowing the electricity to bypass the switch. I would recommend enlisting the assistance of a qualified technician who is experienced in electrical diagnosis to test this circuit with a digital multimeter. Once it is determined that there is a short, a portion of the wiring harness will need to be repaired. This can be done by simply adding electrical tape or could be as difficult as cutting out a piece of wire and replacing it with new wire. Either way, it is best to have this repair performed by a professional to ensure that the job is done correctly, comes with a warranty, and prevents an electrical hazard for yourself.

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