Voltage Regulator Issues!!!!!!!

67Dart273 said
You need to be much more specific, this is confusing. If you are talking about the VR the change was 70/ later VS 69 and earlier. What "chassis ground" are you referring to? What diagram are you referring to?

If you jumper a wire from the battery to the alternator field terminal, this causes "full tilt" charge, and while is a way to test, you should NOT drive the car this way.

Please re-read post 6. With a jumper from battery to alternator field, you should be able to bring up engine RPM and show a charge on the ammeter. You should show an increase on a voltmeter connected to the battery. If the battery is not "too dead" this voltage should come up above 14V

IF that is what you did, it sounds like the alternator is actually OK

If this is the case, make sure the field wiring is OK. RE-read post 6. Jumper the field to battery by jumpering across the two VR wires. That is, disconnect the VR and connect the two together. This should duplicate "full field" as above, and should result in a charge.

If that is OK, replace the VR. The VR MUST be grounded. Since you seem to be having trouble, I would REALLY check that the VR is in fact grounded. Scrape and clean around the bolts and flange, and use star lock washers.

The diagram of the 70 and below charging system you posted in #7. It has a FLD to the chassis and a FLD to the VR. The diagram on the 63 link you posted doesnt show that,so that is why i thought i would try running a wire from the battery, which i understand is different than a chassis ground. So, i went out this morning and the battery read 12.7 with the ignition off, but the wire from the FLD to the battery was still connected. I jumped the wires on the VR and got no rise in charge WITHOUT the wire from the battery to the alternator. I did notice that the readings were the same with the VR connected and disconnected and jumped WITH the FLD to BATTERY connected. Im sorry if this doesnt make sense, im a bit confused and trying to understand it all. It seams like unless that FLD to BATTERY wire is connected everything you suggested didnt charge. This alternator is 2 days old and said tested fine, im going to the junkyard here to look for a new engine harness, maybe theres a short in there.

Jake