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We have a Yamaha sunclassic G5E, dated 1989. Cannot get 12…

Customer Question
We have a Yamaha...

We have a Yamaha sunclassic G5E, dated 1989. Cannot get 12 volts at headlights - volt meter registers 6-1/2 volts with all lights on - use of accessories, lights dim - checked wires (except under cart) seem ok - cleaned wire connectors, no change - cart runs fine - problem has deteriorated over the years ???

Mechanic's Assistant: Have you checked the fuses? Have you checked the bulbs?

Yes, bulbs, fuses, connectors - battery fully charged

Mechanic's Assistant: What is the model of your '89 electric?

It a G5- e

Mechanic's Assistant: Are you fixing your G5 yourself? What have you tried so far?

Yes, all in my first statement

Submitted: 8 months ago.Category: Electric Vehicles
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Answered in 11 hours by:
11/13/2017
Electric Vehicle Mechanic: Curtis B., Other replied 8 months ago
Curtis B.
Curtis B., Other
Category: Electric Vehicles
Satisfied Customers: 31,417
Experience: Worked on fleet of various electric vehicles, golf carts, scissor lifts and electric booms.
Verified

Thanks for giving me the opportunity to work with you! I will do my best to help.

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Electric Vehicle Mechanic: Curtis B., Other replied 8 months ago

With lights dimming and voltage low, check the ground side of the system for bad ground. Use a jumper wire from the battery negative, to go to the lights and see if they get full voltage and are bright. If they are, you know it is a ground wire.

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Customer reply replied 8 months ago
Curtis, From battery to neg on lamp 9v, from ground on lamp 8v. Should chassis produce a neg when connected to neg on lamp? Could power switch be the problem?
Electric Vehicle Mechanic: Curtis B., Other replied 8 months ago

Is battery grounded to the frame or just has floating ground, where negative goes to lights as well as posiitve. Lights are always add on's, and not factory.

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Customer reply replied 8 months ago
Negative goes to lites. My cart is a model G5-ef. Continuity exists from neg on lites to frame.
Electric Vehicle Mechanic: Curtis B., Other replied 8 months ago

This us electric cart? So where is power from lights coming from? Battery pack, or thru a voltage reducer?

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Customer reply replied 8 months ago
Power comes from battery pack, red wire from positive post, a 12 volt connection, no black wire visible from battery pack. Would you like me to send a wiring diagram? give me an email. Checked continuity between neg on battery and battery case with 7ohms reading. Mean anything?
Electric Vehicle Mechanic: Curtis B., Other replied 8 months ago

Not to me. So where is negative coming from? You can attach diagram using the attaching link next to the typing bar, look for tree or paperclip icon.

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Customer reply replied 8 months ago
Negative is come from the back and froward switch. Can you give me a fax number to send you the wiring diagram? Can't find the attachment page.
Electric Vehicle Mechanic: Curtis B., Other replied 8 months ago

Has to go thru the site question, site does not allow direct contact. You have 12 volts from the posiitve to the negative at switch? If not, follow back and see where voltage is lost.

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Customer reply replied 8 months ago
Did you receive the wiring diagram? Checked wiring and all seem ok. Any other ideas?
Electric Vehicle Mechanic: Curtis B., Other replied 8 months ago

I see no wiring diagram. gas or electric cart? G5E should be electric cart.??

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