Question about 1999 GMC Jimmy

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Instrument panel light malfunctioning.

I have a problem with my 1999 GMC Jimmy. At night with my headlights turned on, the light which illuminates the speedometer and tachometer does not come on but the led lights work fine. I discovered that I can get the light to come on when I turn on the dome light or other overhead map lights. What can the problem be and how do I fix it?

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  • DELBERT THOMAS Oct 26, 2012

    Thanx to all of you who have suggested solutions. I will certainly check to see if any of these work. Further information - the gauges work fine. Dimmer switch also works OK. I know this because, as I said in my original post, I can get the light to come on and stay on as long as the dome light or map light is on. With the engine running, parking brake off, in gear (automatic transmission), headlights on, at night, the light should be lit. Jimmy has two options for turning headlights on, one is an automatic setting for daylight driving and the other is the manual setting. The instrument panel light works ( and doesn't work) the same whether in automatic or manual mode. When driving at night, I turn the dome light or map light on, which for some reason causes the instrument panel light to come on, and stay on as long as the dome or map light is on..

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I have a buddy with a Jimmy and his lights did something similar, but once the dash illumination quit, nothing would make them come back on. We ended up replacing the entire light switch assembly, and it fixed it. We assume the dash illumination dimmer switch was shorted out. You may try getting a can of contact cleaner and taking the switch out and spraying all electrical connections related to your lighting to clean them up, THEN look into a new switch if that doesnt help. Hope this helped!!

Posted on Oct 26, 2012

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Posted on Jan 02, 2017

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Mike258
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SOURCE: 1994 gmc safari

Hi there,

When you say you 'lose instrument panel', does that mean instrument panel lighting or the gauges go dead?

When you flip off the headlights, does the instrument panel come back? If it does, forget the fuse box.

If it's the instrument lighting, I'd be looking at headlight switch itself. In Safari's, the headlight switch and panel dimmer switch reside in one assembly. Coincidence? I think not.

I recommend replacing the switch. You can find one at a salvage yard for $5.00.

When you do the replacement, inspect the plugs and wiring attached to the old one for anything suspicious (loose wires, frayed insulation, bare wire, charred wire, etc.)

Let me know how it turns out.
Good luck,

If this works out for you, please take a sec and rate my solution.

Thanks
Mike

Posted on Jul 15, 2008

SOURCE: 1985 gmc sierra truck headlights wont work. its not the bulbs

well we just fixed our truck it was a wire that connects to the starter had some out! might want to see if there are any wires disconnected there

Posted on Dec 31, 2008

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Headlight Switch itself If Not then this Very Well May be in your Multifunction Switch

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SOURCE: 1999 GMC Suburban. no sound from radio

there is a plug at the back of the radio connecting it to the vehicle wiring loom. If you can get at thes plug, either from below or by removing the radio unit, make sure the plug is tight and secure. I can't think that the amp has gone or you would have lost all sound, so this is more than likely the problem.

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SOURCE: 1999 gmc yukon dome lights will not turn off

Is that the only interior light that stays on?

Posted on Sep 01, 2009

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Hi there,

When you say you 'lose instrument panel', does that mean instrument panel lighting or the gauges go dead?

When you flip off the headlights, does the instrument panel come back? If it does, forget the fuse box.

If it's the instrument lighting, I'd be looking at headlight switch itself. In Safari's, the headlight switch and panel dimmer switch reside in one assembly. Coincidence? I think not.

I recommend replacing the switch. You can find one at a salvage yard for $5.00.

When you do the replacement, inspect the plugs and wiring attached to the old one for anything suspicious (loose wires, frayed insulation, bare wire, charred wire, etc.)

Let me know how it turns out.
Good luck,

If this works out for you, please take a sec and rate my solution.

Thanks
Mike

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