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When light switch is turned on, the Red/Black wire must be HOT, if not the switch is faulty.
If Red/Black is HOT, check fuse # 4 and # 8 ( 10 A fuse in underdash fuse box).
At the headlights if there is voltage to the White/Light Green and Dark Green/Light Green wires, the bulbs are bad.
Wednesday, June 2nd, 2021 AT 1:55 PM