ampmeter buried positive on acceleration

47topless

47topless

Well-known member
I just installed a new battery in my 59AB. Car starts right up but, on acceleration, the amp meter is buried to the positive side. I am afraid to drive this car to see if that auto corrects after a while.
Is this normal or is my generator producing too much current?
Thank you,
Mr. pair uh noid
 
With some revs up check the voltage at the A or Batt terminal on the voltage regulator. Should be 7.5 volts with your multimeter set to DC volts. Report back your findings. Regards, Kevin.
 
On a new battery, it should be top charged for a few hours to ensure low load on the generator. The battery voltage should be a bit more than 6-volts. Normal would be around 6.2 volts at rest. If the vehicle has set up for long period then the generator field should be flashed to insure good pole shoe residual magnetism with proper polarity. All the old 6-volt vehicles have positive ground after the model T era. Be sure all related electrical connections are clean and secure.
 
8 volts is only a touch high , so maybe the voltage reg could be adjusted down a little. If you dont know how to do that may I suggest that you take it to an auto electrician. Original ford service bulletins show how to do it. Your new battery may not have been fully charged and so the ammeter may show a high charge for a while until it charges up. Maybe leave it for a while and see if the ammeter drops back. Regards, Kevin.
 
After installing the battery, I connected it to my charger, and it read "FULL". It now measures 6.2 V so I believe that it is fully charged.
I will recheck this AM.
Driving this car around a bit may bring the needle down. I'll try that and if no luck, I have another regulator to try.
Thanks for the response.
"It's always something!".
 
47topless said:
After installing the battery, I connected it to my charger, and it read "FULL". It now measures 6.2 V so I believe that it is fully charged.
I will recheck this AM.
Driving this car around a bit may bring the needle down. I'll try that and if no luck, I have another regulator to try.
Thanks for the response.
"It's always something!".
Click to expand...

a fully charged 6v battery should read 6.37 v .
 
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