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Is the voltage regulator on my 1997 Grand Am 3.1 serviceable, or do I have to replace the entire alternator?

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You must replace the alternator

Posted on Nov 17, 2009

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I am getting a code telling me my voltage regulator diodes are bad on my 1996 Dodge Grand Caravan. Should I be replacing the PCM to fix the problem.


Not sure about the 96 but, voltage regulators generally have to do with the alternator. As a matter of a fact you can just replace the voltage regulator on the alternator as opposed to spending the money that it cost to replace the whole alternator, I found this out because a mechanic ripped me off and charged me for a alternator but, he only replaced the voltage regulator diode part on the alternator.. Replacing the PCM is going to be expensive and in my opinion not necessary

Feb 09, 2017 | Dodge Grand Caravan Cars & Trucks

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Where is voltage regulator located on Ford E150 van located?


voltage regulator is located internally inside an alternator and is usually not a serviceable part. you would either need to replace entire alternator or take it to a alternator shop to have them replace the voltage regulator

Aug 28, 2014 | Cars & Trucks

1 Answer

How to replace voltage regulator in a 1998 mercury grand marquis


THe voltage regulator is in the alternator. They say to repair you have to change the alternator - which is not entirely true. A knowledgable auto electrician can solve the problem at very little cost - comparatively.

Nov 15, 2011 | 1998 Mercury Grand Marquis

2 Answers

I have a 1999 3,8L ford mustang my tester indecates the alt is overcharging,but the batt light is coming on but it goes off! is there anything i can do to besides replace the alt?


Your alternator-mounted voltage regulator has failed. Luckily, your voltage regulator is
replaceable separately from the alternator (most voltage regulators are integral to the alternator,
and cannot be separately serviced).

Note: this works for 3.8L cobra alternators/voltage regulators only - in the 4.6L model, the
voltage regulator is an integral component of the alternator.

1999 Ford Mustang Cobra -3.8L engine

3.8L Engines

1. Disconnect the negative battery cable.

2. Remove 4 Torx® head screws holding the voltage regulator to the alternator rear housing. Remove the regulator, with the brush and terminal holder attached.

Fig. 1. The regulator and brush/terminal holder are mounted on the backside of the alternator

archaeology_70.jpg


Fig. 2. The regulator and brush/terminal holder are secured by 4 Torx® head machine screws


archaeology_71.jpg

Fig. 3. Hold the regulator while removing the screws to prevent the regulator from dropping out and damaging the brushes

archaeology_72.jpg



3. Hold the regulator in one hand and pry off the cap covering the A terminal screw head with a small prybar.

4. Remove 2 Torx® head screws retaining the regulator to the brush holder. Separate the regulator from the brush holder.



Fig. 4. Slide the regulator out-the brushes will move out of the holder

archaeology_73.jpg


Fig. 5. The brush and terminal holder can be separated from the regulator once it is removed from the alternator

archaeology_74.jpg


=========================================================
To install:

1. Install the brush holder on the regulator with 2 retaining screws. Tighten the screws to 25-35 inch lbs. (2.8-4.0 Nm).

2. Install the cap on the head of the A terminal screw.

3. Depress the brushes into the holder and hold the brushes in position by inserting a standard size paper clip, or equivalent tool, through both the location hole in the regulator and through the holes in the brushes.

Fig. 6. When installing the regulator, press the brushes back into the housing

archaeology_75.jpg


Fig. 7. Use a thin piece of soft material, like this plastic wire tie, to hold the brushes in position while replacing the regulator, or use a paper clip inserted in the hole

archaeology_76.jpg



4. Install the regulator/brush holder assembly and remove the paper clip. Install the attaching screws and tighten to 20-30 inch lbs. (2.3-3.4 Nm).

5. Connect the negative battery cable.

Jul 07, 2011 | 1999 Ford Mustang Cobra

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I am having a problem with the voltage system in the Rodeo I just bought. We replace the Alternator and Battery with new ones yesterday and still today the same problem occurs and it will not run unless...


Isuzu Rodeo Recalls Rodeo ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR Recall - ID# 31705 Recall Date MAR 07, 1997 Part Affected ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR Model Affected RODEO Potential Units Affected 118485 Get Details Recall Date MAR 07, 1997

Model Affected 1994 ISUZU RODEO

Description AN INTEGRATED CIRCUIT WITHIN THE VOLTAGE REGULATOR CAN CONTAIN MANUFACTURING ERRORS.

Consequence THIS CAN CAUSE EXCESSIVE ELECTRICAL CHARGING OF THE VEHICLE'S ALTERNATOR, RESULTING IN ENGINE CONTROL MALFUNCTION, AND/OR EVENTUAL ENGINE STALL.

Remedy DEALERS WILL REPLACE THE VOLTAGE REGULATOR WITH A NEW REGULATOR.

Potential Units Affected 118485

Notes ISUZU MOTORS LIMITED

Dec 14, 2010 | 1994 Isuzu Rodeo

2 Answers

How do you replace the voltage regulator?


The voltage regulator on all Escorts is inside the alternator. It is an integral part of the alternator and the alternator has to be replaced to fix it.


Dec 11, 2010 | 1997 Ford Escort

1 Answer

The brake light and battery light are on unless my rpms are up to 4000r. whats going on?


faulty voltage regulator within the alternator!! Replace the entire alternator.

Sep 29, 2010 | 1997 Nissan Maxima

2 Answers

Charging voltage is high -- 1997 Montero Sport


well, the standart rating for the alternator charging is13 t014.5. any number over that number is cal"over charge" and can damage your batterie or other electronics components

Dec 21, 2008 | 1997 Mitsubishi Montero

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