This has been plaguing me for some time now, and I'm finally ready to admit I need help. After finally getting my engine installed and running, the ALT light came on, and I confirmed the battery was not charging. So I took the alternator to A Zone and had it tested. It tested good, so I replaced the repro voltage regulator with an electronic one from Advanced Auto. Light stayed on. I then replaced the alternator and voila, no light!
Thinking that my problem was solved, I re-installed the repro regulator after re-installing the engine (it was out having a leaking rear main seal fixed). Of course in removing the engine, the alternator was disconnected and had to be reconnected. Having done more than one thing before starting the car again, I can't be sure what I did that changed anything, but the ALT light is back on and the battery is not charging. I also added a Painless relay harness for H4 halogen headlights. The lights are nice and bright, but really suck the life out of the battery without a working alternator. Tracing the circuit on my 69 wiring diagram, I can't see where the ALT light picks up ground. Both sides appear to go to battery power.
The car is once again up on ramps, and I'll be checking the ground connections at the block. If anyone has experienced a problem like this before, please jump in to let me know what you did to solve it.
Thanks in advance for any help!
Thinking that my problem was solved, I re-installed the repro regulator after re-installing the engine (it was out having a leaking rear main seal fixed). Of course in removing the engine, the alternator was disconnected and had to be reconnected. Having done more than one thing before starting the car again, I can't be sure what I did that changed anything, but the ALT light is back on and the battery is not charging. I also added a Painless relay harness for H4 halogen headlights. The lights are nice and bright, but really suck the life out of the battery without a working alternator. Tracing the circuit on my 69 wiring diagram, I can't see where the ALT light picks up ground. Both sides appear to go to battery power.
The car is once again up on ramps, and I'll be checking the ground connections at the block. If anyone has experienced a problem like this before, please jump in to let me know what you did to solve it.
Thanks in advance for any help!