Turn signal dont work when headlights are on
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Take all the bulbs out, front and rear, and scrape and clean the brass part of the bulbs and the little tang that contacts the bulb. If that doesn't work, then replace the sockets. If your left turnsignal stays on with the headlights, the work on or replace the left front turn/marker socket. If the right one lights, then work on the right front.
If both brake lights will not work with the headlights on, then work on both rear sockets.
If both brake lights will not work with the headlights on, then work on both rear sockets.
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