2000 Oldsmobile Intrigue Battery Charging problem

MACJACK

MEMBER
2000 OLDSMOBILE INTRIGUE

Electrical problem
2000 Oldsmobile Intrigue 6 cyl Two Wheel Drive Automatic

I have replaced the battery, bench tested the alternator and metered the cables from the alternator to the battery. Then pulled all the fuses not needed by the engine, just to make sure there is not a grounded wire. And pulled out all the lights and checked for grounded wires. No visible signs of problems. Finally I looked at the plug going to the alternator. And as a test jumpered 12 volts to the red wire and on the meter I saw the out put voltage go up. So can you tell me where this wire comes from. There are three wires going to the alternator but this one seems to control how much voltage is produced. I think it comes from the ignition or the computer, but any extra info is greatly appriciated. Or and diagrams you may have.
Thanks.

1 Reply

JDL

MECHANIC
16,098 POSTS

Did you take a voltage reading across the battery post, engine off and read again with engine running?

The red wire L terminal on the multiwire connector is the turn-on signal for the alternator. That may not be full battery voltage. On some systems there is a warning about running full battery voltage to that terminal. The L and F terminal both are connected to the pcm.