Hello all,
I am new to these forums and am hoping to find a guru so that I may pick their brains. I am currently working on a project car for a friend The car is a 1976 Stingray L48. I have ran into an issue that I may need help understanding. I have traced a current drain to the +12V switched terminal at the alternator. I has a constant +12V applied to it at all times and is draining the battery overnight. The car has an aftermarket stereo, subwoofers and amp, and an aftermarket alarm. All of the radio wiring reads correctly with a meter. I removed the subwoofers and amplifier and all associated wiring. The battery drain is still present. I disconnected the two wire harness that attaches to the alternator. The wire for pin 2 at the alternator has a constant 12V. By leaving this this connector disconnected the battery holds a charge and there is no more current drawn from the battery. I disconnected the firewall connector and read from the alternator connector (pin 2) to it's corresponding pin at the firewall connector (engine side) and continuity is good and there is no voltage present. I then read at the firewall (body side) to the corresponding mating pin and there was 12V. I then disconnected the ignition switch and there was still 12V at the firewall (body side). From here there isn't much I can do without a wiring schematic. If anyone either has a good schematic or a link to a good schematic I would really appreciate it. If anyone has any useful insight into this issue it would be greatly appreciated. Much thanks in advance.
I am new to these forums and am hoping to find a guru so that I may pick their brains. I am currently working on a project car for a friend The car is a 1976 Stingray L48. I have ran into an issue that I may need help understanding. I have traced a current drain to the +12V switched terminal at the alternator. I has a constant +12V applied to it at all times and is draining the battery overnight. The car has an aftermarket stereo, subwoofers and amp, and an aftermarket alarm. All of the radio wiring reads correctly with a meter. I removed the subwoofers and amplifier and all associated wiring. The battery drain is still present. I disconnected the two wire harness that attaches to the alternator. The wire for pin 2 at the alternator has a constant 12V. By leaving this this connector disconnected the battery holds a charge and there is no more current drawn from the battery. I disconnected the firewall connector and read from the alternator connector (pin 2) to it's corresponding pin at the firewall connector (engine side) and continuity is good and there is no voltage present. I then read at the firewall (body side) to the corresponding mating pin and there was 12V. I then disconnected the ignition switch and there was still 12V at the firewall (body side). From here there isn't much I can do without a wiring schematic. If anyone either has a good schematic or a link to a good schematic I would really appreciate it. If anyone has any useful insight into this issue it would be greatly appreciated. Much thanks in advance.
:L
