Quote:
Originally Posted by Jim/GA
If the ammeter needle does NOT move when you turn on the headlights, as I think I understand from you, the ammeter is not connected properly or the ammeter is defective.
Start there.
The diode cutout might also be bad, but you need to get the ammeter working first.
Trace the wires from the generator to the terminal box to the ammeter to the terminal box to the starter switch. Something in there is not right.
When you turn the headlight switch on, do the lights light up? If so, the headlight switch is getting power from somewhere. If not, that's why the ammeter needle is not moving.
If wired correctly, the ammeter might just be defective. Is it an original or a reproduction? The repro ammeters are notorious for being defective.
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Everything worked fine until today. The ammeter always showed a charge with the engine running at high idle.
When the engine was not running the ammeter always showed a discharge when I turned on the headlights.
The ammeter is a new repro.
The cutout is a new diode type.
Both have been on the car for at least three years BUT they have only a few hours of run time on them.