Originally posted by stepmar2:
Taking it out of the tour tommarrow. Opening it up and replacing brushes from O'Reilly. $7.49/set.



Make sure you replace the springs as well.
The problem youa re experiencing is due to the brushes being worn down and the springs are sprung out...
At high rpms, the springs no longer provide enough tension to keep the brushes from floating freely.
When the brushes start floating, you get your ALT light.

The same thing happened to my Alternator at 90,000 miles and I replaced the whole thing.
At that mileage, the bearings in the alternator need to be replaced as well as the regulator, brushes, and springs.
Make sure you do a thorough job.
You don't want to have to take it back out !!!

Pete... 2004 Mercury Marauder 300A Black Clearcoat/Dark Charcoal LEATHER DOB 10/31/2003 DOP 1/2/2004 www.mercurymarauder.net