Outer Limits 4x4 Board

when my car is on idle my battery light comes on
i have duel batt's , the volt meter shows above 12v ,
when i rev it past 1000rpm/1200rp, the light goes away
ive turned up the idle a little bit to see if maybe it was just a low idle causing the problem ........ any idears ?????

It may be on its way out.
Some time it needs a bit more speed (rpm's) to get it started. but as long as the light goes out and the volt's stay above 13V you should be right.

what may be on it's way out ????
the alt ????

alternator brushes are most prob worn , reco time

[quote="hiy6o"]alternator brushes are most prob worn , reco time[/quote
]

Yes the Alt.
It will not be the brushes. It might be the reg or diodes.