The Ford Barn

ctvpa · 11-02-2013, 12:57 PM

I have done a search, and checked all the books, but here is my problem.

This is a fresh restoration, I have a professionally rebuilt generator. I cannot get any charge on the ammeter. It will show discharge, but never a charge. Running the car it shows 0, and will discharge when the lights are on. So far I have:

Replaced the ammeter (twice)
Checked the ammeter by reversing the wires, and when I turn on the lights, the ammeter shows charge (reversed from discharge) so I know the needle works.
Replaced the cut out (Diode)
Took the generator to the restoration shop where it tested fine.
New Battery
adjusted the 3rd arm the full length of travel
Used my multimeter every way in the Les Andrews book
(Of interest when I put the meter on the output of the generator I get very inconsistent readings)
Re-polarized the generator
Tested it and it will 'motor'
verified all my wiring.

Very frustrating, any ideas
Craig

700rpm · 11-02-2013, 01:33 PM

Run a jumper wire from one terminal to the other on the cutout and rev the engine. If it now shows charge the cutout is defective.

Also, sometimes the cutout is OK and the ammeter is just sticky, though you say you've replaced yours twice. If they're repros, try a drop of light machine oil on the base of the needle. Repros are notoriously troublesome.

Tom Wesenberg · 11-02-2013, 06:58 PM

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Check the voltage at the generator post and body at fast idle. If it's not over 7 volts then the trouble is inside the generator.

11-02-2013, 12:57 PM	#1
ctvpa Senior Member Join Date: Apr 2012 Location: Massachusetts Posts: 479	not charging I have done a search, and checked all the books, but here is my problem. This is a fresh restoration, I have a professionally rebuilt generator. I cannot get any charge on the ammeter. It will show discharge, but never a charge. Running the car it shows 0, and will discharge when the lights are on. So far I have: Replaced the ammeter (twice) Checked the ammeter by reversing the wires, and when I turn on the lights, the ammeter shows charge (reversed from discharge) so I know the needle works. Replaced the cut out (Diode) Took the generator to the restoration shop where it tested fine. New Battery adjusted the 3rd arm the full length of travel Used my multimeter every way in the Les Andrews book (Of interest when I put the meter on the output of the generator I get very inconsistent readings) Re-polarized the generator Tested it and it will 'motor' verified all my wiring. Very frustrating, any ideas Craig

11-02-2013, 01:33 PM	#2
700rpm Senior Member Join Date: May 2010 Location: Portland, Oregon Posts: 5,906	Re: not charging Run a jumper wire from one terminal to the other on the cutout and rev the engine. If it now shows charge the cutout is defective. Also, sometimes the cutout is OK and the ammeter is just sticky, though you say you've replaced yours twice. If they're repros, try a drop of light machine oil on the base of the needle. Repros are notoriously troublesome. __________________ Ray Horton, Portland, OR As you go through life, keep your eye on the donut, not the hole.

11-02-2013, 06:58 PM	#3
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: not charging Sponsored Links (Register now to hide all advertisements) Check the voltage at the generator post and body at fast idle. If it's not over 7 volts then the trouble is inside the generator.