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EZ Go golf cart electric 36v won't go. I last drove it 2

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EZ Go golf cart electric...
EZ Go golf cart electric 36v won't go. I last drove it 2 nights ago, parked it. Today it won't move.All terminals read 38v. both the A1 and B1, the two nodes on the solenoid, everything reads 38v. When I press the accelerator there is a "straining" noise, as if the thing is trying to do something. Is my controller bad?
Submitted: 1 year ago.Category: Small Engine
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Answered in 12 minutes by:
9/9/2016
Technician: Curtis B., Technician replied 1 year ago
Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 29,123
Experience: have worked on and around most engine models for 35 yrs./Polaris ATV expert
Verified

Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!

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Technician: Curtis B., Technician replied 1 year ago

Will the cart roll, showing the brakes are not locked?

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Technician: Curtis B., Technician replied 1 year ago

If you raise the rear of the cart with both wheels of the ground, and turn one manually, does the other wheel turn in opposite direction? It should if axles and differential are ok.

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Customer reply replied 1 year ago
not locked
Customer reply replied 1 year ago
All the connections are good, I pulled them all and shined them up. I didn't mess with the controller or solenoid. But i checked the voltage there and all the posts show the same voltage save the negative post
Technician: Curtis B., Technician replied 1 year ago

Have you jacked it up to check the axles?

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Customer reply replied 1 year ago
all wheels turn freely. You can roll the whole cart back and forth easily. The rear wheels turn opposite of each other. This is not a stuck brake issue.I cleaned the terminals of everything. All terminals exhibit the same voltage (except the negative terminal). When the accelerator is depressed, the solenoid clicks and a "straining" sound is heard. It is like a bad connection but I've checked and all connections are clean and tight.
Customer reply replied 1 year ago
None of the wires gets hot. None of the connections is hot. All batteries are fully charged and working normally. The same results in forward and reverse.
Technician: Curtis B., Technician replied 1 year ago

Noise is at controller and not drive motor? Drive motor coupler not stripped and motor is running, but not driving transmission?

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Customer reply replied 1 year ago
This is an electric cart. There is no transmission. There is a battery, key switch, accelerator, controller, and motor. Nothing is stripped and it was running when parked 2 days ago. I use this cart to patrol the estuary and watch for bears. I need to be sure it is in operating condition.
Technician: Curtis B., Technician replied 1 year ago

Call it what you want, but Ezgo has a coupler between the drive motor and the transaxle.

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Technician: Curtis B., Technician replied 1 year ago

Call it what you want, but Ezgo has a coupler between the drive motor and the transaxle

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Customer reply replied 1 year ago
Ok. The A1 and B1 come out of the controller, go to the solenoid, then run directly to terminals on the motor housing. There are two smaller wires, the A2 and B2 that attach near the heavier gauge wires. I don't see any intervening device.
Technician: Curtis B., Technician replied 1 year ago

What is year model and controller number? A1 and A2 are the armature wires, and the B1 and B2 are the field wires .

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Customer reply replied 1 year ago
I just had the controller rebuilt in NC in June. It's a 97 EZ go
Customer reply replied 1 year ago
The label says Curtis PMC
P/N 73144G03
S/N 15523
Technician: Curtis B., Technician replied 1 year ago

If the controller is powering up, problem is usually at the drive motor, and drive motor coupler is suspect!

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Customer reply replied 1 year ago
Could you describe the position of the DMC? Is it on the starter or near the controller?
Technician: Curtis B., Technician replied 1 year ago

DMC?

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Customer reply replied 1 year ago
drive motor coupler
Technician: Curtis B., Technician replied 1 year ago
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Technician: Curtis B., Technician replied 1 year ago

Last image is the coupler.

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Customer reply replied 1 year ago
it resides inside the motor housing? How does it fail? Is it mechanical or electric?
Technician: Curtis B., Technician replied 1 year ago

It is a mechanical coupler that splines to the transaxle, it fails when it strips out the spline on motor or transaxle end.

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Customer reply replied 1 year ago
Wouldn't that demonstrate a weakness prior to failing? This cart worked fine 2 nights ago, but won't go at all today after being parked 2 days. Is that a mechanical symptom?
Technician: Curtis B., Technician replied 1 year ago

With the controller making noise, as it powers up, I'm thinking that it may be motor.

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Technician: Curtis B., Technician replied 1 year ago

With the controller making noise, as it powers up, I'm thinking that it may be motor.

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Customer reply replied 1 year ago
OK. Thanks for your assistance. That's all the time I have for today.
Technician: Curtis B., Technician replied 1 year ago

OK< here is an Ezgo site with basic trouble shooting and it has drive motor test too, just scroll down the opening page past the manuals until you find the troubleshooting section.

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Technician: Curtis B., Technician replied 1 year ago
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Technician: Curtis B., Technician replied 1 year ago

Thanks

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Technician: Curtis B., Technician replied 1 year ago

I see question is still open, did you find problem?

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Curtis B.
Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 29,123
29,123 Satisfied Customers
Experience: have worked on and around most engine models for 35 yrs./Polaris ATV expert

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