When I start the car, the parking brake, antilock, and charging lights are on.

[doctorx]

They go out if i rev the engine. It wasnt doing that previously. Over the weekend, I changed out the instrument cluster circuit board, but was working fine the last couple of days. I dont think that is the issue, at least i hope it isnt. It seems to be the alternator, but with this car, I am not sure. Ideas?

12.1v with engine off. At idle with those 3 lights on, 13v. Rev to 2000 and the lights go off... mostly. 14.2v+ Revving the engine and the charging light comes on faintly.

[roguetoaster]

The voltage regulator is probably at fault, so either get that or another alternator, but you should check the belt tension and your engine bay grounds first.

[wodcutr]

Your battery is not holding a good enough charge for the computers to function good. A healthy battery is 12.8 volts. The car runs off the battery. The alternator only keeps the battery charged!

[doctorx]

The voltage regulator is probably at fault, so either get that or another alternator, but you should check the belt tension and your engine bay grounds first.

i have a new one on the way. Hopefully today. New belt and it is proper tension. Ill check the grounds also.

Brand new battery.. (well.. 9 months old anyways).

[doctorx]

turned out the alternator was bad. new Vr did not fix it. Tested bad. Thanks!

[roguetoaster]

Bummer, but at least you got it sorted.