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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV.

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Unread 07-20-2008, 01:04 PM   #11
Not Yet Wild
Join Date: Jul 2008
Posts: 5
Default Re: Newb with 88' EZ GO needs help -.-

Hi again guys, I have bad news this time. -.- The charger did eventually kick off on its own but I'm sure they were charging for a good 11-12 hours straight. The level on the batteries actually rose to well above the plates and almost to the bottom of the openings of each cell. So no water was added. My dad unplugged the charger put the seat back on and went to try it out. He put it in reverse and tapped on the pedal. The battery on the far left side of the cart exploded and the cart took off like the pedal was stuck down. Battery acid sprayed the floor of the garage and inside the battery compartment. One of the electrical boxes in the battery compartment then started to get so hot it started glowing red.

Now we have the batteries pulled out, and we're not sure why the battery exploded. The rest of the batteries are near full since after the charging and actually appear to be bulging at the sides. I got a volt meter and touched the poles of each battery they all read a steady 6 volts, even the exploded one still reads 4 volts The electrical box that started glowing cooled off on its own.

Any ideas why the batteries are doing this? Are they just no good, sat too long, got cold, too hot, bad connection, charged them too long?

Exploded Battery

Exploded Battery

Unexploded Battery that is bulging at the sides

Battery acid on the floor

This box got hot and started glowing

Is there any chance the remaining batteries are still good?

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Unread 07-20-2008, 04:47 PM   #12
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Join Date: Oct 2007
Location: Snellville, Ga.
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Default Re: Newb with 88' EZ GO needs help -.-

If after charging for 11-12 hours and batteries are reading 6v they are dead. 6v is a discharged voltage. Good batteries should read around 2.3 v per cell fully charged.
I'm curious about that box that overheated. I have little experience in carts, but have never seen that before. It looks like it has some heavy control wiring going into it. Is it a box covering resistors? If so, resistors can get red hot when cart is run a low speed.
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Unread 07-21-2008, 01:03 PM   #13
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Location: Republic of Texas
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Default Re: Newb with 88' EZ GO needs help -.-

Yes that is the resistor housing. There are three resistors of different gauge that bleed off excess energy to control speed. If the wiper arm on the speed board does not have full, free, and complete movement across all the contacts then you will see some heat show up on the resistors. Also, the solenoid may be stuck.

BTW, I think you should shop for batteries>>>
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Unread 07-21-2008, 01:15 PM   #14
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Default Re: Newb with 88' EZ GO needs help -.-

The battery that exploded has an internal short, thats why it exploded. If any of the others are showing similar signs I would get rid of them ASAP. Mike is correct, at 6 volts the batteries are considered dead.
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