Headlight short

The headlite switch has a rheostat that can generate heat, and the plug itself can be the issue.
If you remove the switch, you can inspect it, and the plug, clean as nec.
To remove the switch, batt disconnected, pull the headlite knob out till it stops, THEN reach up behind the switch, and press and hold the "spring release button" on the switch, as in pic, pull knob out the rest of the way.
The release button is one of the 4 protrusions shown in the pic
Good luck
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