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Unread 08-01-2008, 09:21 PM   #11
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Default Re: 91 cc 36v won't go

Verify that the F/R switch is passing voltage the right way, I can never remember which post is which. But if you look at it you can tell which wires should be passing voltage.

If that checks out ok, then you should consider doing an external motor test. You will need to disconnect the wires from the motor. (use two wrenches so you do not turn the posts and label everything well.)


A1 + A2 =Continuity
S1 + S2 = continuity

A1 + S1 = no continuity

A1, A2, S1, S2 + Motor Case = no continuity.

If you cant read motor markings:

The posts alternate. The first and third post should have continuity, and the second and fourth post should have continuity.

The First post should have no continuity with the second post.

No post should have continuity with the case of your motor.
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Unread 08-01-2008, 10:28 PM   #12
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Default Re: 91 cc 36v won't go

The White wire on the f/r swithc had 36 volts in forward and the black wire to the motor had 18 volts when placed in reverse. I checked the continuity to the motor posts and none were shorted to the case. 1st and 3rd read fine but when I got to the 2nd and 4th it was hard to get a reading. It would not zero out and had some resistance, it got down to 2ohms, another time it would read open. This could of been because it was hard to reach and I wasn't making good contact or there could be a problem. The posts were tight and did not move.
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Unread 08-01-2008, 11:31 PM   #13
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Default Re: 91 cc 36v won't go

Is it possible this cart could have a broken coil ? Or bad connection from the resistor coil board? If you have power coming out of the wiper switch just keep on following it to the motor.......
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Unread 08-02-2008, 12:03 AM   #14
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Default Re: 91 cc 36v won't go

Scratch the posts with your lead when you are checking it. There may be some rust blocking the reading.

Also, you could use jumpers to make getting the reading easier.
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Unread 08-02-2008, 01:55 PM   #15
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Default Re: 91 cc 36v won't go

I put a jumper wire on it and it came up to 89k ohms, Shouldn't it zero out or close to it. Very strange I thougth it would read open or O.
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Unread 08-02-2008, 03:28 PM   #16
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Default Re: 91 cc 36v won't go

It could be a partial short on the inside of the motor.
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Unread 08-02-2008, 04:24 PM   #17
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Default Re: 91 cc 36v won't go

Thanks for all of your help, I guess it is time for a motor.
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Unread 08-03-2008, 04:32 PM   #18
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Default Re: 91 cc 36v won't go

To remove the motor do you remove 4 bolts in the head to the trans plus the bracket on the side. Is there any thing else to it then that or is there anything internal I have to remove?
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