Could a bad dimmer cause blown dash fuses?

J

jwcma

Founding Member

Aug 5, 2002

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Bay Area, CA

Jul 19, 2006

#1

• Jul 19, 2006

• #1

I noticed that the dimmer does not work anymore. The dash lights will come on only when the dimmer is turned all the way (to turn on the courtesy light). I blow the two dash fuses (I can't remember the location numbers) whenever I rev the motor past 3500 or so. I can get a replacement dimmer, but does anyone think I have a bigger problem? I have a 3g alternator.

 

PuterAmI

Member

Mar 29, 2003

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Madison, Alabama

Jul 19, 2006

#2

• Jul 19, 2006

• #2

Gosh, I wish I knew what year Mustang you are talking about. I traded ESP for CRS.

 

J

jwcma

Founding Member

Aug 5, 2002

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Bay Area, CA

Jul 19, 2006

#3

• Jul 19, 2006

• #3

My bad, it's an 88.

 

jrichker

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Dublin GA

Jul 19, 2006

#4

• Jul 19, 2006

• #4

Since you are probably not the original owner, someone else has wired something into the dimmer circuit that has burned up the dimmer. You get to start looking for "add on" items like gauges, stereo, alarms, etc. One of them is probably wired to the dimmer and is causing your problem.

 

J

jwcma

Founding Member

Aug 5, 2002

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Bay Area, CA

Jul 19, 2006

#5

• Jul 19, 2006

• #5

There's nothing wired to the dimmer circuit - I've done all the wiring since the car was new. I have a couple of gauges but they're all fed by a separate 8ga wire coming directly from the battery.

Is something wrong with my alt that would cause my dash fuses to blow when revs get past a certain point (like 3500 or so)? Perhaps a voltage regulator?

 

Bolt on 5.0

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Jun 26, 2002

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Suffolk, NY

Jul 19, 2006

#6

• Jul 19, 2006

• #6

sounds like you have 2 seperate problems. Replace the switch if it is not woring correctly. It should be fairly cheap. Then look into your fuse problem