Dash lights dim when I turn on the headlights.
1989 2dr 5 spd 6 cyl 4.3 reg. cab. 35,500 miles. Put in a new alternator and battery but still does it. Vehicle was stored a lot.
Adjust the instrument lights to the level you want. There should be a little wheel next to the head light switch - turn it to the level you want.
Turn on the lights and the dash goes off. I adjust the dial to max and it will light up but not when turned down a little. The cab light works fine.
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