Question about 1998 Ford Mustang

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Where is the voltage regulator for 1987 ford mustang

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1987 is a spit year, u can have the old style regulator or the new style that attaches to the back of the alternator, go to www.rockauto.com and look up voltage regulator under electrical heading

Posted on Jun 24, 2009

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A bad constant voltage regulator, located on the back of the instrument cluster, will prevent the gauges from reading correctly or at all. It can be inspected with a test light.

Posted on Jun 23, 2009

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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

1 Answer

I have a 87 mustang thats getting to much fuel


if carburetor check carb float level if injected it could need the fuel pressure regulator adjusted you may need an after market fuel pressure regulator even with a carb especially if its not the stock fuel pump

Feb 25, 2011 | 1987 Ford Mustang

1 Answer

What would cause the the instrument pannel voltage regulator to fail on a 66 mustang? The gauges do not work mow.


It's called a CVR, constant voltage regulator, to keep all gauges with same voltage all the time, regardless of spikes. They seldom fail. I did not think we used one back in 66, but I did not start working for Ford until 1975. I would replace it and seee what happens. Let me know.

Jan 20, 2011 | 1966 Ford Mustang

1 Answer

99 mustang fuel gage stuck on half, low fuel light works


If the gauge remains in one position, on or off, full or empty, then it may be a bad gauge, or a faulty voltage regulator for the gauge. If the instrument panel is removed, there is a printed circuit on the back which ties to all gauges and lights. Check it for breaks or corrosion. The voltage regulator should be mounted to the same area and supplies regulated voltage to the fuel gauge. Hope this helps!

Sep 19, 2010 | 2000 Ford Mustang

1 Answer

Why is it that my 1966 ford mustang is not holding a charge after replacing the alternator and short circiut relay


THE 1966 FORD MUSTANG YOU HAVE EXTERNAL FIELD RELAY ITS AIR GAP IS .015 POINT GAP .020. VOLTS TO CLOSE 2.5 VOLTS THE VOLTAGE REGULATOR AIR GAP .049 - .056 POINT GAP .017 - .022 VOLTS AT 125 DEGREES TEMPERATURE IS 13.8 - 14.4 VOLTS.

Jul 12, 2010 | 1966 Ford Mustang

1 Answer

Remove door glass on a 1987 Mustang


Drill out the two 1/4 inch rivets holding the glass to the regulator. remove the window runs. remove glass.

Oct 08, 2009 | 1987 Ford Mustang

1 Answer

Horn wont stop blowing in 1987 mustang


Ford horns are famous for this disconnect the black ground wire from the horn front of vehicle next to radiator. This will stop it for noe you will need to replace the horn all the parts houses have them. Good Luck

Nov 22, 2008 | 1987 Ford Mustang

1 Answer

Too much fuel to engine


Fuel pressure regulator

Aug 21, 2008 | 1987 Ford Mustang

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