65 barracuda not charging PLZ help
The 69 / earlier charging circuits are dead nuts simple. You should go over to MyMopar and download the closest you can find for a shop manual, and an electrical diagram.
The VR only has two terminals (plus ground). One is the IGN power AND sense AND field power, and the other leads off to the alternator field
So.........
If you have not, check continuity from the field terminal on the alternator---with the field wire disconnected..........to ground. It should show only a few ohms. If so, "rig" a jumper wire direct from battery to the field terminal. Do not leave connected only long enough to run test
Start engine, monitor battery voltage and watch ammeter, and slowly bring up RPM. Voltage should increase, ammeter should show charge. Do not allow to climb over 16V
If this works, the alternator is OK "for now."
Make CERTAIN VR is grounded. Remove, scrape around mounting bolts and re-mount using star lock washers. Turn key to "run." With everything connected normally, "back probe" the green field wire at the alternator and see if you have any voltage. Should be approaching 12V. If nothing, the VR is bad
THE ALTERNATOR MAY HAVE caused the failure, either due to a bad field drawing too much current, or mistakes IN THE FIELD TERMINALS of the rebuilt resulting in a short, etc etc. Use your head
Read the service manual. There is a procedure in there to measure field current draw of the alternator
The 69 / earlier charging circuits are dead nuts simple. You should go over to MyMopar and download the closest you can find for a shop manual, and an electrical diagram.
The VR only has two terminals (plus ground). One is the IGN power AND sense AND field power, and the other leads off to the alternator field
So.........
If you have not, check continuity from the field terminal on the alternator---with the field wire disconnected..........to ground. It should show only a few ohms. If so, "rig" a jumper wire direct from battery to the field terminal. Do not leave connected only long enough to run test
Start engine, monitor battery voltage and watch ammeter, and slowly bring up RPM. Voltage should increase, ammeter should show charge. Do not allow to climb over 16V
If this works, the alternator is OK "for now."
Make CERTAIN VR is grounded. Remove, scrape around mounting bolts and re-mount using star lock washers. Turn key to "run." With everything connected normally, "back probe" the green field wire at the alternator and see if you have any voltage. Should be approaching 12V. If nothing, the VR is bad
THE ALTERNATOR MAY HAVE caused the failure, either due to a bad field drawing too much current, or mistakes IN THE FIELD TERMINALS of the rebuilt resulting in a short, etc etc. Use your head
Read the service manual. There is a procedure in there to measure field current draw of the alternator
