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Want to replace voltage regulator - Roadrunner Race Scooter 250cc - RR i scooter

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Posted on May 31, 2014

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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

1 Answer

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

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1991 Dodge Dakota electrical problem I have replaced Alternator still will not charge where do I start from here


When you replaced the alternator, did you also replace the voltage regulator? I have read that on this truck, the voltage regulator is internal to the ECU and is located on the firewall near the ignition coil. You may be able to install a separate, dedicated voltage regulator available at your local auto parts store. Please note that you may have to rewire from the ECU connector to the stand-alone voltage regulator. Good luck.

Oct 09, 2013 | 1991 Dodge Dakota

1 Answer

Replacing voltage regulator


Not sure what you mean when you say Replacing voltage regulator. Would need to know the model number of the engine however as a general rule a voltage regulator is fairly easy on most of the John Deere mowers. As with any electronics when you buy they are not returnable. Depending on the engine you have a voltage regulator can be costly and may not fix your problem.

Sep 29, 2013 | John Deere Garden

1 Answer

My 2005 honda 600 vlx shadow when I start it it runs for a few seconds and blow the inginition switch fuse


before you replace the fuse again, get a multimeter
set meter to measure volts,
put red on battery positive
black on battery negative
replace fuse and watch voltage meter when you start it again.
if the voltage is 15.0 or higher , then your voltage regulator is over charging.
replace voltage regulator.
voltage regulators put out 12.75 - 14.50 volts.
notice the meter as you rev it up.
it should climb from 12.75 to 13.50+ just off idle at approx 2000 rpm

voltage regulators go bad.
the signs are over charging and under charging.

replace voltage regulator and retest.
hope your riding soon
Big Al

Aug 08, 2012 | Motorcycles

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

2 Answers

There is a ground some were that is causeing the battery not to charge put new selinoid ,new battery,alternater,new key lock cylender check wirers fuses relay switches and battery still wont charge


It sounds like you have done a whole lot of replacing and not much "diagnosing". Did you chech for battery voltage at the alternator? There should be battey voltage at the large Black/Orange wire that is on the B+ terminal of the alternator. This wire should have voltage all the time. If there is no battery voltage, you most likely have a burned fusible link at the starter relay area.
There should also be voltage at the "S" terminal with the ignition on. If there is no voltage, then check for voltage at the "S" terminal of the voltage regulator. If there is no voltage at the "S" terminal on the voltage regulator then check the "I" terminal on the regulator for voltage.

NOTE: The voltage on the "S" terminal should be 1/2 that of the voltage on the "I" terminal.

If there is voltage on the "I" terminal, make sure your voltage regulator is grounded properly to the fender and retest to see if it is charging the battery. If it is still not charging, disconnect the regulator connector and connect a jumper between the "A" and "F" terminals of the connector. Start the engine. The alternator should now be charging the battery at high voltage (usually over 15 volts) If it does, replace your voltage regulator. If it does not, then you need to check your wiring between the voltage regulator and the alternator.

Please also review this article:

What Else Could Be Wrong?

Jun 15, 2011 | 1987 Ford F 150

3 Answers

Where is the voltge regulator on a 1989 lincoln town car


VOLTAGE REGULATOR IS LOCATED BEHIND BATTERY.YOU PROBABLY MIGHT HAVE TO REMOVE BATTERY TO REMOVE THE VOLTAGE REGULATOR.

May 16, 2010 | 1989 Lincoln Town Car

2 Answers

Where is the voltage regulator located on my 91 GMC K1500 5.7L?


The voltage regulator is inside of the alternator, it is an integral voltage regulator, so if the voltage regulator is faulty, the whole alternator needs to be replaced.

Jan 08, 2010 | 1991 GMC K1500

2 Answers

How to change a voltage regulator for 95 Buick Park Avenue


The voltage regulator is built in to the alternator. It's better to replace the whole alternator then to just replace the regulator. The regulator and other parts like the bearing all have about the same amount of life time, unless the battery is weak which can put extra taxes on the regulator. Good luck and hope this helps.

Nov 03, 2009 | 1995 Buick Park Avenue

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