Why do my dashboard lights go out when headlights go on?
When Day Running lights are on, dashboard lights work fine. When they auto switch to headlights, dashboard (including radio) go out. Local mechanic says he can't fix, but probably dealer can.
Check for ground And Check switch with olms meter
Check tail light fuse. they may be out. When taillights go out, dash lights go with so you will know, and not be driving around without taillights and not know. The way it works, is in daylight, the dash lights are on all the time and are not adjustable, (unless you turn on headlights manually). But when headlights are on, they are on a different circuit, and can be dimmed..and that's one thing you can check, see if you have them dimmed to nothing
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