Ok so 12.39 on open circuit is a pretty good battery under these conditions.
12.15 with engine running - you are NOT charging that battery - heck it is below open circuit voltage. Uhh was that with engine idling or at about 1500 RPM.
Uhhh you do have power to the regulator I hope - sure wont charge if not.
OK one side battery bonded to ground. Other side just one cable going to starter solenoid. Somewhere on this terminal should also be a terminal for alternator lead. Trace the big wire off alternator to whereever it goes - should be here. Look for flaky and or overheated crimp connections (about this stage I would be tempted to solder each and every one)
and get RID of ALL inline crimps used to splice - cut em out splice using Western Union and solder. Two wraps of Scotch 33 tape and heat shrink for pretty.
Go to Home Depot and get bottle of Noalox antioxidant
- yes made for aluminum connections I know
BUT works well on copper AND believe it or not on battery terminals. I use on ALL crimp and mechanical connections.
Dan Bentler
Last edited by leitmotif; 12/20/2010 1:53 AM.
