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The illumination of the dash during the daytime is at full brightness, normal. When the head lamps and such are turned on the brightness of the dash illumination is overridden by the dimmer. Turn the dimmer up. Usually rotation of the headlight knob will do the trick. Now if you have an electronic dimmer then it may have failed and will require replacement. Obviously the illumination works so the issue is the night time configuration of the lighting through the dimmer.

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โˆ™ 2009-06-13 01:43:56
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Q: 1989 Chevy 2500 why do lites on radio and ac show during day but turn on lites all dash lites go out?
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