<VV> Gen /Fan light glows brighter as you rev the engine!!

[Ken Pepke]

Good answer ... but there can be another factor.  The 'gen' light, as with any other bulb, glows when current passes through it to ground.  That is to say when there is a potential differential.  In a car generator / alternator system when the generator sends opposing current to the bulb the potential is equalized so the light goes 'out.'  Too much current / voltage from the generator can introduce a new differential and cause the bulb to glow.  As always, the greater the difference the brighter the low.  Unfortunately the new ground can be quite difficult to find.  A volt meter will tell if the battery is receiving a charge or being overcharged, so it might be easier to learn to live with the glow than to find the problem.

Ken P
Wyandotte, MI
Worry looks around; Sorry looks back, Faith looks up.
On Jul 11, 2012, at 9:26 PM, Matt Nall wrote:

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> As I press the accelerator, the Gen/Fan light begins to glow.  Faster the engine 
> revs the brighter the light glows.  What might be going on?
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> you forgot a "subject"!!  It makes it look like SPAM...  many will not open it!
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> Then you don't say what vehicle you have and is it a Generator  or Alternator, etc...
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> Going on the premise that it's a '64 or older.. with a Generator..
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> Your generator brushes are worn....   simple / cheap fix...
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> Matt Nall
> Charleston, Oregon
> http://tinyurl.com/The-Patio
> http://tinyurl.com/Matts-Tech-Pages]