alternator or voltage regulator?!?!?
#1
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alternator or voltage regulator?!?!?
Hey all,
Over the past year i have been fixing up a 91 LS that i rescued from its 7 year garden grave. It has devoured 2 batteries. I checked alternator and it was charging good but discovered a parasitic drain. After much frustration I narrowed it down to that stupid bumper on brake peddle being missing. Fixed that and no more drain. Then the ECM fried from water so I had to replace that and fix cowl. Now the car is dry and water proof again. Now as of yesterday a massive battery drain is back and the battery is fried. The alternator is putting out 16.5V at idle and the battery drain stops when I disconnect the alt. in wire from under hood fuse box.
My questions are these. First, is the voltage regulator internal or external? All the replacement alternators I have looked at say internal but that finned silver box on drivers strut tower is labeled at voltage regulator. Second. Is my overcharge issue a result of the alternator or that separate "voltage regulator"? Any tests I can perform to confirm?
Thank you!
Over the past year i have been fixing up a 91 LS that i rescued from its 7 year garden grave. It has devoured 2 batteries. I checked alternator and it was charging good but discovered a parasitic drain. After much frustration I narrowed it down to that stupid bumper on brake peddle being missing. Fixed that and no more drain. Then the ECM fried from water so I had to replace that and fix cowl. Now the car is dry and water proof again. Now as of yesterday a massive battery drain is back and the battery is fried. The alternator is putting out 16.5V at idle and the battery drain stops when I disconnect the alt. in wire from under hood fuse box.
My questions are these. First, is the voltage regulator internal or external? All the replacement alternators I have looked at say internal but that finned silver box on drivers strut tower is labeled at voltage regulator. Second. Is my overcharge issue a result of the alternator or that separate "voltage regulator"? Any tests I can perform to confirm?
Thank you!
#2
Re: alternator or voltage regulator?!?!?
Your alternator has an internal voltage regulator.
If disconnecting the alternator connectors cures the drain, then the alternator is shorted internally.
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