Had the same problem with my angry headlight. The feedback caused my high beams to stick on and the high beam light on the dash to stay partly lit at all times. Iirc something would blow a fuse too. I added a diode to the harness as well as an isolating relay, but the diode failed after a few months, never fixed it.
The headlight switch failing will also cause the doors to go up when only in the running light position.
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