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Electric Yamaha Electric Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles



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Old 04-06-2021, 07:41 PM   #1
Feverdog04
Not Yet Wild
 
Join Date: Apr 2021
Posts: 1
Default Converted to LI, one good run and now dead

I have a 2007 YDRE, 48v Yamaha. My batteries were beginning to go out, so I converted to lithium. I bought 3 RELiON batteries and installed as instructed.

problem 1:
After installation, there was an immediate loud beep (like if the cart was in reverse). It beeps in forward, and slightly louder in reverse.

I took the cart for about a 1/4 mile ride with the beeping. It drove better-faster than it ever has. I brought the cart home and put it on the charger for about two hours.

Problem 2
I took the cart off the charger and tried to drive it. It will not go anywhere. No click, no movement.
The lights work, the batteries are at a full charge.
I tested the solenoid with a voltmeter and the accelerator pressed down. DC volts stay at zero, so I assume it is fine. Any ideas?? My wife is gonna kill me after this $3,500 battery purchase. Lol.
The cart still ran fine before I converted to lithium, it just wouldn’t last long. Batteries were 4 years old.

I have a DE24007 LR Motor, and SX motor controller (stock I believe).
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