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How do you know if its the diodes or the regulator if alternator isn't chargingOn A 94 Pontiac firebird?
On any alternator you can check with a voltmeter -- disconnect the positive going to the alternator, use a towel or electrical tape to isolate it, then start the car and you should read DC volts accross the terminal of 12-16v if the diodes are working, if they arent switch it to AC -- if you read > 2v your diodes are shorted I'm pretty sure the diodes and regulator are integrated into the Alternator -- so just replace that, otherwise you can take it off and they can check it at any Kragens for free.
What else can I help you with?
Where is the voltage regulator located on a 1991 Pontiac Firebird with a V6 3.1 liter engine?
Inside the alternator.
Where is the air pump on a 1987 Pontiac Firebird?
it is under the alternator
Can you replace an alternator with a reg inside in a 1970 Pontiac gto?
the regulator is inside the alternator and yes you can take the alternator apart and just replace the regulator.
How do you find the voltage regulator on a 1990 Pontiac Sunbird LE?
The voltage regulator is inside the alternator.
Where is the voltage regulator located on a Pontiac Bonneville V6 engine?
it is in the alternator
Where is location of voltage regulator on 93 Pontiac sunbird?
Inside the alternator.
Where is the voltage regulator located on a 1989 Pontiac formula?
Inside the alternator
Were is the voltage regulator on a 1972 Pontiac LE mans?
It's inside the alternator.
Where is the voltage regulator located in a 1978 Pontiac Trans Am?
Inside the rear of the alternator
Why your alternator does not charge the battery in your Pontiac firebird 1991 v6 3.1l you have bought new alternator What shall you do?
Repair the alternator to battery connections or replace the battery.
Does a 1997 Sunfire have a voltage regulator and where?
A 1997 Pontiac Sunfire would have a voltage regulator and it would be found inside the alternator.
Does a 1994 Pontiac Firebird have a speed regulator?
My 1994 Trans Am does, it will go up to 110. I found out that the top speed of a 1994 Firebird or Trans Am is 156 mph.
