Electrical problem (Please help)

[SamMe]

1998 Ford Explorer XLT installed 3 altnators w/voltage reg. and still receave 19+ volts, re-did all grounds and got my battery out of Caravan 6 cyl only 1month old and works fine in van what else could it be? and check for any shorts on + side and none, also no batt. light and amp gauge is in middle between L & H, Tks.

 

[sehaare]

What did you use to measure the voltage and did you try using it on your other car to check that the meter is good?

I don't have the wiring diagrams for this car but generally a charging system has a wire going to the alternator from the battery that tells the voltage regulator what the alternator's output is. Assuming this charging system works the same way, if that wire had a poor connection it would cause it to drop some voltage across the bad connect and cause the alternator to raise it's output voltage.

 

[2000StreetRod]

V6 or V8?

You didn't post if you have the V6 or the V8. The charging circuit (V6 shown) is fairly simple.

Check the 30 amp fuse in the power distribution box. I don't know the fuse number - find it in your Owner's manual.

 

[SamMe]

Yea, checked with Digital volt meter and to make sure reading correctly compared on van also and it read correctly. I did disconnect regulator connector from alt. yellow stripe and green from there and alt. put out was 12.5 volts, am I missing something.Does the PCM have anything to do with this setup?