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Dash Lights, Radio Lights, etc, go off when head/parking lights are turned on

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Old 05-04-2004, 05:56 PM
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Exclamation Dash Lights, Radio Lights, etc, go off when head/parking lights are turned on

Anytime I turn on either the Parking or Headlights, all the interior ones crap out. I'm thinking a bad ground? Maybe the switch went bad? Please help!!!

Foglights were wired into the car and I have used them some. They are wired to that when I turn them on, the interior lights dim a "second cycle". The "first cycle" being when you turn on your headlights the clock dims. It dims even more. Not a problem, just FYI. Maybe it will help you help me

NOTE: 1994 Trans Am
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Old 05-04-2004, 06:24 PM
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make sure that your dimmer switch isn;t tuned all the way down
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Old 05-04-2004, 07:18 PM
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I had the same problem with my 92 Firebird. If i tapped(carfully hit) the top of the dash they would come on. its not the answer but it worked.
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Old 05-04-2004, 09:26 PM
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Originally posted by HBHRacing
make sure that your dimmer switch isn;t tuned all the way down


I messed with the switch as soon as it happened, nothing.
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Old 05-04-2004, 09:47 PM
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does the switch do what it should though?
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Old 05-05-2004, 07:29 AM
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Originally posted by HBHRacing
does the switch do what it should though?
I can't tell, everything turns off totally--blackness.
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Old 05-05-2004, 09:04 AM
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right, but when you have the lights off so it;s not dark and you turn the dimmer does it work correctly or not do anything. both the dimmer switchs and headlight switchs are known to short out
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Old 05-05-2004, 08:36 PM
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Originally posted by HBHRacing
right, but when you have the lights off so it;s not dark and you turn the dimmer does it work correctly or not do anything. both the dimmer switchs and headlight switchs are known to short out
When everything is off, it does jack squat. I checked all the fuses (underdash and engine bay). They're all good. The fog lights were "ghetto rigged" and wired in...weird. They get the power from the light in that little compartment in front of the cup holder.

Where can I check if the switch(s) shorted? Thanks for all your help thus far!
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Old 05-06-2004, 08:14 PM
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Ok, pulled the dash cover tonight and pulled the switch. It looks good and so does all the wiring but as you said could be shorted. How can I test if it's shorted or not?
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Old 05-07-2004, 08:55 AM
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Just a question... Does the car have an aftermarket radio? Also, I believe that you can not get power from the ashtray light as it is connected through the reostat (SP? / dimmer) and causes a ground loop situation.
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Old 05-07-2004, 11:13 PM
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Originally posted by RamAirTA95
Just a question... Does the car have an aftermarket radio? Also, I believe that you can not get power from the ashtray light as it is connected through the reostat (SP? / dimmer) and causes a ground loop situation.
Aftermarket radio -- No. It's got the stock AM/FM/CD.

I should have been more specific. It looks like the foglights power is simply tapped into the wires going to the ashtray light. If that lights goes through the dimmer, then it's very likely the extra power draw just fried the dimmer switch right?

Sure hope so.
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Old 05-17-2004, 08:24 PM
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Ok guys, I fixed it! 5 minutes, $20 and vuelia!

I bought a new dimmer/headlight switch from a board member (EddieP -- Best seller EVAR!). Put it in and bam everything is back to normal. Needless to say the fogs are coming out this weekend though. Thanks for all the help!
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