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
I have the exact opposite problem. On my 2003 Highlander, the dash lights are off when the daytime running lights are on but when the headlights (or even parking lights) are on, the dash lights are on. The dash lights used to be on when the DRLs were on. Does anyone have any ideas?
I had this problem and found that it went away when I adjusted the dimmer switch. I have a 2013 Toyota Highlander Limited.
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