High volts
I've read and reread this thread, to bad i'll never understand it :( Son just blew out 2 new headlights when ammeter pinned it self.
Tell us what you don't understand.
Do you have a digital multimeter (DMM)? If not, I'll never understand why people try electrical trouble-shooting without one.
Do you have a wiring diagram? Ditto above.
The voltage difference from the case of Vreg (blk DMM lead) to the IGN wire (red DMM lead) should be close to the voltage difference across your battery (from BATT- to BATT+). It should normally measure ~14.5 V. If much higher, you have an excessive drop thru your wiring, ignition switch, grounds, and/or connectors. Use your DMM to find the drop(s).
Don't know how to use a DMM? Check youtube.
The video posted above is great (apparently a Berkeley grad, like my older son!). I'll add a few comments:
a) The Vreg's shown are for the early "round-back" alternators (1 field terminal). If you don't have an electronic one (1st shown), get one, though some electronic ones are packaged in the 2nd big case.
b) In addition to checking for minimal drop from BATT+ to Vreg sense, also check the drop from BATT- to the case of Vreg.
c) I never rely on getting a ground thru the sheet metal screws and always run a separate wire to the case.
