Question about 1987 Ford Bronco II

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Power drain i have a bronco 2 i have changed the altinator and starting silnoid and battery twice now i had been looking for the voltage regulator and the only one that i see is on the alternator where would it be located at

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Go to they have a GREAT online manual for almost everything. look under the repair manual partof it. You may have to register, but belive me it's worth it!

Posted on Jul 19, 2008


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My car keeps surging wanting to die after it starts up

Common Problems That Trigger the P052 Code
  • Defective Alternator
  • Defective Alternator wiring or connector(s)
  • Defective B+ battery cable from Alternator to battery
  • Poor Charging System ground(s)
  • Defective PCM wiring/connection to Alternator
  • Defective PCM
  • Defective Voltage Regulator
  • Large Parasitic battery drain
  • Defective Battery and/or cables
Common Misdiagnoses
  • Battery
  • Starter
Check the condition of your battery cables - are they corroded/have broken wire strands? Also check where the negative battery lead attaches to the engine/bodywork.

Check all the wiring for breaks and tightness - a small earth wire can be loosened and retightened to create a better earth. Corroded power wires can struggle to supply the correct voltage - remove and clean whatever you can find.

It's unlikely to be your alternator as you say it has been checked - the voltage regulator is built into the alternator so it must be okay.

A parasitic drain can be difficult to find. Try switching off everything - radio, heater ... the next time you start the car. If you know somebody who has a voltmeter and knows how to check for a power drain .. ask them.

The link below shows a Saturn PCM (it may not be your actual model..). Check all wiring around the PCM

Where To Find The ECM Module 3 0 Litre Saturn Vue

Apr 19, 2016 | 2003 Saturn VUE

3 Answers

I have a 2004 Nissan maxima. The altinator went out so i replaced it and the battery. One week later, the same problem i had the first time, losing power and car draining the battery, happened. I replaced...

The only time I've had a problem with an alternator repeatedly failing is due to improper shimming and the pully wasn't aligned with with the cam and crank shaft which in turn put a tweak in the alternator pully and strain on the bearings. I must point out, this was on a 1978 Chev with V belts. The one that failed a week later, did you have it tested to be sure it failed? Same question for the most recent one. If the alternator are not indeed failing, I'l look to either the ECM or the battery cables/wiring from alternator to battery.

Nov 14, 2014 | 2004 Nissan Maxima

1 Answer

Battery lite comes on sometimes. replaced battery for 2x this year and had altinator checked on and off vehicle. it tested bad on and good 5x off (at 2 separate locations). told mechanic to check line...

you have a pcm controlled voltage regulator... in other your voltage regulator is built into the pcm... you can either replace the pcm or have the voltage regulator reinstalled on the alternator... the latter is cheaper most of the time... its not as simple as unbolting it from the pcm and its not something a home user can try to do... better to take it to the professionals for this. try a good alternator and starter rebuilder in your area... then and only then can you start testing to see why the battery light comes on whenever

Dec 28, 2013 | 1998 Plymouth Voyager

1 Answer

I changed the battery yesterday and started the truck twice. The 3rd time there was no juice to turn it over. Regulator or alternator?

usually regulator. Charge battery for a few hours. Start engine and see if the voltage is 14 1/2 approx. That would mean system is charging and it's a bad battery

May 22, 2011 | 1985 Ford F150

1 Answer

My jeep just shuts down for no reason. Lights, interior lights, radio, all fail. New battery installed.. help


Sep 26, 2010 | 2000 Jeep Grand Cherokee

2 Answers

I have an 81 bronco and the truck only runs while it has battery power then dies. I had the alternator checked and it was fine and I also replaced the battery and fuseable link...

I would have someone else check the alternator, and the voltage regulator. a simple check you can do yourself is while the engine is running, take a non-magnetic screwdriver and hold it to the back of your alternator(right in the center, there is a metal nub sticking out) there should be a strong magnetic pull if there is none, it is one or the other, probably the voltage regulator. I think your car is old enough that you should be able to disconnect the battery cable with the car running, if it dies, then you have charging problem, if it don't then something else is draining your power, it would have to be a very bad short, and you would smell something burning.

Feb 18, 2010 | 1981 Ford Bronco

2 Answers

I just recently replaced my altinator and battery and everytime i try to start it its dead what are some possible problems?

possible problems are endless, could be the voltage regulator, could just be some sort of drain in the electrical system ie a dome light that is burnt out but maybe the switch is in the on position. when you jump it it starts up? Does it click when you try and start it? It could be the starter or starter solenoid and not a power issue. hope this helps

Oct 27, 2009 | 1987 Toyota Pickup

1 Answer

1991 Dodge 4x4 truck altinator will not charge, new altinator, all fuses are good and serkets. Altinator will not charge.

Change voltage regulator. Does the battery take a charge from a charger? If not, replace battery. If it does, then regulator is faulty. If still nothing, return alternator to place of purchase, and have it checked.

Oct 16, 2009 | Dodge D150 Cars & Trucks

2 Answers

Lost power while driving

hi if your altinator went bad then when you jump it, it will start then die once the juice has ben used in the battery,it sounds like your altinator has gone bad.get a jump and remove the posative battery terminal when the car is running.if it dies instantly your altinator is bad.

Feb 06, 2009 | 1997 Infiniti.5 Q45

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