Having problems with your Chevrolet Classic ?

I tried to charge my car battery with a Chicago Electric charger model 66783. I followed the directions for charging the battery in the vehicle. After selecting the charge rate of 10 AMPs, the ammeter pulsed back and forth between zero and about 9 AMPs. The 'Charge Complete' light cycled on and off also. This is not consistant with what the directions describe is supposed to happen. Do I have a charger problem or a battery problem? I have not driven my vehicle (1954 Chevy truck) for about 6 mont

Posted / edited by AnonymousUser on : 11-12-2017

Answers :

Relax, the charger is working fine. What it is doing is charging the battery to 15.5V. During this time, the "charge complete" LED is off, and the current meter shows the needle going to the right. When 15.5 volts is reached, the current is shut off, the needle goes back to the left, and the LED goes on. When the battery voltage drops to 13 volts, the current goes on again, etc. At the beginning, with a very depleted battery, the needle will be towards the right, then as the battery gets charged close to full capacity, the needle will bounce back and forth because the charger is feeding current in short pulses. Towards the very end of charging, the needle will stay longer and longer at the left end (the LED will be ON), and spend less and less time to the right (LED will be ON for longer periods, and "blink" OFF less and less). Finally, at full charge, the LED will stay ON, the needle won't make excursions to the right, etc.
Try disconnecting the battery and try to charge it again. if this does not work try charging a good battery if this still happends you have a faulty charger.
Repair Help & Product Troubleshooting for Chevrolet Classic

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