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



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Old 03-16-2008, 06:23 AM   #1
utopia
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Default Yamaha G1-EM4 electric nightmare

Hello, newbe to golfcars. Someone gave a G1-EM4. The big wire from the back of the speed control loop that goes to the right front post on the motor was disconnected. with batteries charged I touched the wire to the post and sparks flew with lots of noise from the motor. Looks like the solenoids got real hot. How do I check if the motor is fried. Also looking for a service manual. Thanks. Big John in Phoenix
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Old 03-19-2008, 12:46 PM   #2
Carts Zone
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Default Re: Yamaha G1-EM4 electric nightmare

Take the motor out and you can bench test the motor by jumping a wire from a1 to s2. Then use some jumper cables and put power on the other two post. The motor should spin. Here is a link to the parts book http://www.yamahagolfcar.com/partsan...0176_ZR5RN.pdf
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Old 03-19-2008, 06:34 PM   #3
smallblock450sl
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Default Re: Yamaha G1-EM4 electric nightmare

Quote:
Originally Posted by Carts Zone View Post
Take the motor out and you can bench test the motor by jumping a wire from a1 to s2. Then use some jumper cables and put power on the other two post. The motor should spin. Here is a link to the parts book http://www.yamahagolfcar.com/partsan...0176_ZR5RN.pdf
Take the motor out and bench test it ? With no end plate suporting the armature end ? I have never heard of this test. That would be an experiance I'd rather not get involved with! Later dave
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Old 03-22-2008, 07:50 AM   #4
utopia
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Default Re: Yamaha G1-EM4 electric nightmare

Thanks for your help guys. I went to www.empinc.biz and followed the instructions they have for testing a motor bolted in place. The motor seemed to work ok so I took it apart an cleaned it up. If I find I need more power the good folks at EMPINC is the way to go when buying a new motor. I was wondering if someone could explain how the how the current flows from the battery positive through the system bact to the ground. Again, thanks for your help.
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