Charging issues
Thread Starter
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Mountain Pass
Joined: Mar 2022
Posts: 204
Likes: 68
Charging issues
Hello,
my 1966 F250 FE 352 is barely charging. I started the engine and the voltage read at the battery was 12.5V. I checked the voltage at the F terminal of the alternator and it was 6.3V. I pulled the connector of the voltage regulator and jumped A to F to force the alternator to full power. I could hear an increase of load, but the voltage of the battery went only up to 12.8V. I would expect a much higher value without the voltage regulator. The battery got recently (~1y) replaced by the PO, I checked the battery with a battery (load) tester and it was good.
My next steps would be to:
Thanks!
my 1966 F250 FE 352 is barely charging. I started the engine and the voltage read at the battery was 12.5V. I checked the voltage at the F terminal of the alternator and it was 6.3V. I pulled the connector of the voltage regulator and jumped A to F to force the alternator to full power. I could hear an increase of load, but the voltage of the battery went only up to 12.8V. I would expect a much higher value without the voltage regulator. The battery got recently (~1y) replaced by the PO, I checked the battery with a battery (load) tester and it was good.
My next steps would be to:
- Check the wiring from the alternator and the voltage regulator, especially ground. Clean all contacts.
- Pull the alternator and let it check at the next part store, replace if needed
- Replace the voltage regulator
Thanks!
Cross-Country
Joined: Jan 2022
Posts: 50
Likes: 8
If you consider your large 12.5v battery to be a load, and you connect a 14v charger to that load, I would expect to see battery voltage of about 12.8 that creeps up the longer you keep the charger connected.
The load drops the charger system voltage below its peak rated voltage,
Disconnect the battery and see if you have about 14v coming out of the jumpered alternator.
The load drops the charger system voltage below its peak rated voltage,
Disconnect the battery and see if you have about 14v coming out of the jumpered alternator.
Thread Starter
|
Mountain Pass
Joined: Mar 2022
Posts: 204
Likes: 68
If you consider your large 12.5v battery to be a load, and you connect a 14v charger to that load, I would expect to see battery voltage of about 12.8 that creeps up the longer you keep the charger connected.
The load drops the charger system voltage below its peak rated voltage,
Disconnect the battery and see if you have about 14v coming out of the jumpered alternator.
The load drops the charger system voltage below its peak rated voltage,
Disconnect the battery and see if you have about 14v coming out of the jumpered alternator.
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