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Alternator overcharging Alt. overcharges, on 98 camaro 3.8l, when excellerated gauges goes into the red causes the ABS Inop light to come on and car is holding back really bad. Doesn't make good sense to me.

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Posted on Jan 02, 2017

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SOURCE: hyundai sonata

no charge can cause this but an overcharge new to me

Posted on Oct 13, 2008

  • 662 Answers

SOURCE: i have a 1999 3,8L ford mustang my tester

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


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


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


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


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


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


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


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.

Posted on Jul 07, 2011

  • 12223 Answers

SOURCE: Camaro 98 model 3.8L alternator overcharging/ ABS INOP lights up.

see the diagram and fix it. you can go too.
God bless you568b1a6a-054f-4e9a-ba9d-e91485a36e90.jpgd889bc8d-bc4a-4e4d-8c88-813b9d82f84a.jpg48179d68-9927-4251-9b6e-fef64744ae9c.jpg

Posted on Jul 25, 2013

  • 12223 Answers

SOURCE: alternator overcharging

go to translate this web with your browser see the topic and fix it. use too

God bless you

Posted on Jul 25, 2013

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go to translate this web with your browser see the topic and fix it. use too

God bless you

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My jeep is overcharging by the gauge

with a car that old its possible the gauge is off but to be sure you can go to autozone or pepboys im pretty sure they will test the charging system for free . or if you have a volt meter you can check it yourself it should be 14-14.8 with the car running anything higher than 14.8 is overcharging . if it is overcharging you will need an alternator for sure and if the battery is over 3 years old its best to replace that too so you dont break down in the near future because overcharging cooks the battery so whatever life it has left has been cut hope this helps

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Hyundai sonata

no charge can cause this but an overcharge new to me

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the altinator is the only thing that can cause this battory cant put out that kind of voltage the altinator has a built in part on most called a regulator that drops it down some have an external regulater even the computer cant make it produce that kind of voltage the most likely problem would be alt or wiring to the alt can get bad ones from time to time

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