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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 12592
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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Having trouble with a 2002 yamaha golf cart. I get 48V accross the bat

Customer Question

Having trouble with a 2002 yamaha golf cart. I get 48V accross the batteries just setting, but nothing works. When I connect the charger I get 71 volts accross the 48V batteries and no amperage showing on the charger. When I switch from tow to on I here a solenoid click at leaST ONCE. SOMETImes WILL CLICK ABOUT EVERY 2 SECONDS FOR 3 OR 4 TIMES THEN NOTHING. Also when I switch from tow to go the headlights work sometimes. the radio works sometimes, but as soon as I press on the pedal everything goes dead. Any ideas on what could be the problem?
Submitted: 1 year ago.
Category: Small Engine
Expert:  Curtis B. replied 1 year ago.
Welcome to JUST ANSWER small engines, let me try to help you !! What does the battery pack voltage read when you press the pedal? Does it drop very low? Look for bad battery or cable connection. Check each battery's voltage!
Customer: replied 1 year ago.
I don't have a meter on the cart. I have taken each battery out of the circuit and tested for voltage under load. All read 8v.
Customer: replied 1 year ago.
volyage across entire bank is 46.3v
Expert:  Curtis B. replied 1 year ago.
Charger is seeing something it does not like! Or it would show a charge rate.
Expert:  Curtis B. replied 1 year ago.
What is voltage at the charger connection on cart?
Expert:  Curtis B. replied 1 year ago.
with 6. 8 volt batteries, voltage is low at 46.3
Customer: replied 1 year ago.
Without charge plugged in it reads 46.3. with charger plugged in it reads 70.3 volts
Expert:  Curtis B. replied 1 year ago.
But no amps?
Customer: replied 1 year ago.
That is currect. no amps
Expert:  Curtis B. replied 1 year ago.
I think you have a bad connection or cable in the primary circuit.
Customer: replied 1 year ago.
What do you consider the primary circuit?
Expert:  Curtis B. replied 1 year ago.
You say each battery as 8 volts. X 6 equals 48 volts. ??
Expert:  Curtis B. replied 1 year ago.
Primary circuit, charger port, to battery pack, back to charger port!
Customer: replied 1 year ago.
with everything turned off i read 48.8v across the 6 batteries
Expert:  Curtis B. replied 1 year ago.
What is this reading when pedal is pushed?
Expert:  Curtis B. replied 1 year ago.
I will be back in hour.
Customer: replied 1 year ago.
it reads about 25v then it jumps back up to over 48v. I will be gone in 30 minites. won't be back until tomorrow. Sorry you couldn't help me.
Expert:  Curtis B. replied 1 year ago.
So batteries are dead! So charger is not working. Do you have friend with same cart you can check charger with?
Customer: replied 1 year ago.
Batteries are good. Less then 6 months old and all check good, both stand alone and with a load. How do you check a battery charger? When I plug it in I get 48.9 volts out. No i do not have a friend that owns a golf cart.
Expert:  Curtis B. replied 1 year ago.
Did you ever check the voltage at the charger port on the cart? Same as battery pack? If so, and charge does not increase across battery pack by at least 5 volts, the charger has no output. Charger has internal relay that has to close, to power the transformer and capacitor. either can be bad, and give no output, as well as the diodes. If your relay is closing in the charger, and fuse or circuit breaker is good, I suggest you find someone who works on chargers.
Customer: replied 1 year ago.
When I plug the charger into the cart I read appx 71.2 volts across the charger port.
Expert:  Curtis B. replied 1 year ago.
What does the battery pack read?
Customer: replied 1 year ago.
71.2
Expert:  Curtis B. replied 1 year ago.
You are getting 71 volts across the pack, and it is not charging? ????
Expert:  Curtis B. replied 1 year ago.
Makes no sense!
Customer: replied 1 year ago.
I agree. That's why I talking to you.
Expert:  Curtis B. replied 1 year ago.
Have you opened the charger?
Customer: replied 1 year ago.
Yes. Nothing looks burned
Expert:  Curtis B. replied 1 year ago.
sometimes it is obvious problem, wire loose or burned component.
Expert:  Curtis B. replied 1 year ago.
Does it have relay with two terminals? Jump across the terminals.
Customer: replied 1 year ago.
So what' next?
Expert:  Curtis B. replied 1 year ago.
You want to try and fix charger ? Try replacing the capacitor.
Customer: replied 1 year ago.
First. How do I check charger to see if it is good?
Expert:  Curtis B. replied 1 year ago.
Put it in the cylinder
Customer: replied 1 year ago.
What do you mean?
Expert:  Curtis B. replied 1 year ago.
sorry wrong post!
Expert:  Curtis B. replied 1 year ago.
I can't tell you how to repair charger.Other than try replacing the capacitor.
Customer: replied 1 year ago.
Sorry you could not help me.