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Old Aug 30, 1999 | 01:24 PM
  #1  
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What is it?

On my 76 Ford F-100 under the dash I found a white ceramic type box mounted behind the light switch on the body. The wiring harness (3 connector) was unplug. I plugged it back up and no difference in anything. What is this box? My useless Haynes manual show nothing of it.
 
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Old Aug 30, 1999 | 06:04 PM
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What is it?

Could it be the dimmer resistance for your dash lights? Obviously they will only be on when the parking or headlights are on, so may be hard to see in the daylight...

 
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Old Aug 30, 1999 | 08:24 PM
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What is it?

It sounds like a ballast resistor to the ignition coil. I know several aftermarket companies sell universal replacement ballasts that are about 1x1x3 inches - made of white ceramic - rated about 1.5 ohms. Possibly the remnants of someone elses ignition upgrade?
 
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Old Aug 30, 1999 | 09:57 PM
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What is it?

The ceramic "pot" is the dash light resistor. Impossible to see the difference in daylight.
 
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Old Aug 30, 1999 | 10:17 PM
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390fe
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What is it?

 
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