'94 ds Club Car will not charge

[freemanpjcn]

I have a '94 Club Car DS 36 volt that will not take a charge. I have an aftermarket charger LV-3648. The batteries each read around 6.1 volts. The whole pack, 36.2. The charger is supposed to be fully automatic. When I first plug in the charger, the amperage needle jumps up initially to about 17 then drops to about 5 after 15 seconds. The voltage at the batteries goes up to 38.0. After a few hours the charger is still on but the amperage meter drops to 0, but voltage across the batteries still read 36.2. It does this even with new batteries. I sent the charger back to the company I bought it from and they say it's good.