Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Make and model? Gold cart? What is voltage? 36 or 48 ? Do you have a voltmeter to test battery voltage on each battery and the battery pack? One bad battery or a bad cable will affect pack voltage and so the cart.
I see a second question/statement, but i have no information from you.?? Golf cart? Make and model? voltage? Club Car would have a speed limiter on the drive motor, unplug it and test.I will cancel the second question. Please answer here!
Without any information, I will opt out. Sorry.
I see no one else has tried to help. Let me try again, if you like. Battery voltage is not where it should be. The 6 volt batteries , fully charged will be close to 6.5 volts and the battery pack will be around 39 volts. If you meter is accurate, you are not there. Does the charger run full 8 hour cycle? Adding extra battery is not good idea, as it confuses the system and the charger.