The Ford Barn

jayvee34 · 09-13-2021, 05:07 PM

On a 6 volt negative ground alternator that test 6.57 Volts with headlights on
low beam and the Amp meter reads 5 amps +. With the headlights on high beam the voltage is still testing 6.57 volts, but the amp meter is now reading
-1 amp.
Is there a problem with my amp gauge? I don't understand a constant 6.57
volt reading and the amp gauge dropping off as mentioned above.

I can increase the RPM's and the amp needle does not move. (still showing
6.57 volts) I can turn the lights off and amp needle does not move.
I can shut the engine down and restart, the amps needle goes to 30 + amps,
and then slowly decrease to 9 amps and stay there until I turn the lights on, then it is back to as mentioned above.
Any answer or help will be greatly appreciated.

09-13-2021, 05:07 PM	#1
jayvee34 Senior Member Join Date: Apr 2021 Location: St. Augustine, Fl. Posts: 437	Voltage/Amperage question? On a 6 volt negative ground alternator that test 6.57 Volts with headlights on low beam and the Amp meter reads 5 amps +. With the headlights on high beam the voltage is still testing 6.57 volts, but the amp meter is now reading -1 amp. Is there a problem with my amp gauge? I don't understand a constant 6.57 volt reading and the amp gauge dropping off as mentioned above. I can increase the RPM's and the amp needle does not move. (still showing 6.57 volts) I can turn the lights off and amp needle does not move. I can shut the engine down and restart, the amps needle goes to 30 + amps, and then slowly decrease to 9 amps and stay there until I turn the lights on, then it is back to as mentioned above. Any answer or help will be greatly appreciated. __________________ IN GOD WE TRUST - SEMPER FIDELIS John Last edited by jayvee34; 09-13-2021 at 05:21 PM.