Rusty 72
Well-Known Member
Hi all.
So I have a 1972 Charger that when purchased it had an entirely burned wiring harness due to the Alt. From what I've read its a common issue...sadly. Anyway, I removed the entire interior and engine harness and installed a MSD box and single wire Alt, pretty much hot wiring it so I could move it around until I could source another harness.
Ive recently acquired a new (used) harness for the interior and engine. I followed the Mad Electrical instructions on by passing the Alt and adding a few fusible links and installed everything. I kept the MSD box and single wire Alt installed.
Now its running fine and I have all electrical again but when I checked the battery when it was running it read 38-40 volts! I quickly shut it down and rechecked the battery with it off and off it read 12.4. Started it up again and the same thing 38-40 volts. So I shut it down.
The Alt was working fine previous to me installing the new harness?? I cant figure out what would be causing it? The Mad Electrical diagram has the power going from the starter relay battery post thru the system and back to the relay post. I thought this odd? could that be causing the issue? or maybe I don't have a ground connected correctly on the interior?
Sorry for the long post.
Thanks in advance Jeanette
So I have a 1972 Charger that when purchased it had an entirely burned wiring harness due to the Alt. From what I've read its a common issue...sadly. Anyway, I removed the entire interior and engine harness and installed a MSD box and single wire Alt, pretty much hot wiring it so I could move it around until I could source another harness.
Ive recently acquired a new (used) harness for the interior and engine. I followed the Mad Electrical instructions on by passing the Alt and adding a few fusible links and installed everything. I kept the MSD box and single wire Alt installed.
Now its running fine and I have all electrical again but when I checked the battery when it was running it read 38-40 volts! I quickly shut it down and rechecked the battery with it off and off it read 12.4. Started it up again and the same thing 38-40 volts. So I shut it down.
The Alt was working fine previous to me installing the new harness?? I cant figure out what would be causing it? The Mad Electrical diagram has the power going from the starter relay battery post thru the system and back to the relay post. I thought this odd? could that be causing the issue? or maybe I don't have a ground connected correctly on the interior?
Sorry for the long post.
Thanks in advance Jeanette