Yamaha G9 start problem.

CP241 · 08-15-2018, 05:35 PM

did you check voltage at the S/G and check the brushes in the S/G?

Cory1007 · 08-15-2018, 06:03 PM

If I jump the solenoid it will crank over really good.

CP241 · 08-15-2018, 06:24 PM

OK then check the small terminals on the solenoid. One side should be +12VDC with key on and pedal depressed. The other should have continuity to ground all the time.

I'd bet you're missing ground at the solenoid. May be worth trying to just run a jumper wire from that terminal directly to the negative battery terminal for testing and see what happens.

Cory1007 · 08-15-2018, 06:38 PM

Ok checked the solenoid I have ground for sure. On one side but no 12v on the other it reads no voltage.

CP241 · 08-15-2018, 08:45 PM

next steps would be check the ignition key switch and the pedal switch. when key is turned on you should have 12v at both wires at the switch. one of those wires goes to the gas pedal so you should have 12v at one of the wires at the gas pedal. when you press the gas pedal down both wires should have 12v, which feeds to the solenoid.

You're losing power somewhere between the battery and the solenoid, and the only things in between are the key switch and pedal switch.

Cory1007 · 08-16-2018, 05:12 PM

Have 12v going in an out of both the switch and gas pedal switch.

sho305 · 08-16-2018, 05:33 PM

G9 12v goes to the key, the pedal, then back white/red wire to solenoid/coil/ignitor. That white/red wire should be hot with key on and pedal down and run all three. If it is then grounds are bad, the grounds are wired. Usually you will see power in the ground wires if bad connection when you try it. Any connector or connection is suspect, its very common for them to fail at this age.

Cory1007 · 08-16-2018, 05:52 PM

I found a white wire with a black stripe I believe it is and its broken off at the connector. Going into the black box by the coil and gas tank. Could that cause it.

Cory1007 · 08-16-2018, 06:28 PM

Thanks for all the help guys I'm done messing with it I'm going to pull the motor an harness out an out a different motor in it. Found a nice predator for cheap so out with old in with new.

CP241 · 08-16-2018, 06:51 PM

lot less work to just repair the harness but good luck :)

08-15-2018, 05:35 PM	#21
CP241 Nincompoop village idiot Join Date: Apr 2018 Location: Michigan Posts: 9,690	Re: Yamaha G9 start problem. did you check voltage at the S/G and check the brushes in the S/G?

08-15-2018, 06:03 PM	#22
Cory1007 Not Yet Wild Join Date: Aug 2018 Location: Rural Retreat va Posts: 24	Re: Yamaha G9 start problem. If I jump the solenoid it will crank over really good.

08-15-2018, 06:24 PM	#23
CP241 Nincompoop village idiot Join Date: Apr 2018 Location: Michigan Posts: 9,690	Re: Yamaha G9 start problem. OK then check the small terminals on the solenoid. One side should be +12VDC with key on and pedal depressed. The other should have continuity to ground all the time. I'd bet you're missing ground at the solenoid. May be worth trying to just run a jumper wire from that terminal directly to the negative battery terminal for testing and see what happens.

08-15-2018, 06:38 PM	#24
Cory1007 Not Yet Wild Join Date: Aug 2018 Location: Rural Retreat va Posts: 24	Re: Yamaha G9 start problem. Ok checked the solenoid I have ground for sure. On one side but no 12v on the other it reads no voltage.

08-15-2018, 08:45 PM	#25
CP241 Nincompoop village idiot Join Date: Apr 2018 Location: Michigan Posts: 9,690	Re: Yamaha G9 start problem. next steps would be check the ignition key switch and the pedal switch. when key is turned on you should have 12v at both wires at the switch. one of those wires goes to the gas pedal so you should have 12v at one of the wires at the gas pedal. when you press the gas pedal down both wires should have 12v, which feeds to the solenoid. You're losing power somewhere between the battery and the solenoid, and the only things in between are the key switch and pedal switch.

Today
BGW	Sponsored Links __________________ This advertising will not be shown in this way to registered members. Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum

08-16-2018, 05:12 PM	#26
Cory1007 Not Yet Wild Join Date: Aug 2018 Location: Rural Retreat va Posts: 24	Re: Yamaha G9 start problem. Have 12v going in an out of both the switch and gas pedal switch.

08-16-2018, 05:33 PM	#27
sho305 Vegas modded 420 Join Date: Jun 2009 Location: West MI Posts: 15,445	Re: Yamaha G9 start problem. G9 12v goes to the key, the pedal, then back white/red wire to solenoid/coil/ignitor. That white/red wire should be hot with key on and pedal down and run all three. If it is then grounds are bad, the grounds are wired. Usually you will see power in the ground wires if bad connection when you try it. Any connector or connection is suspect, its very common for them to fail at this age.

08-16-2018, 05:52 PM	#28
Cory1007 Not Yet Wild Join Date: Aug 2018 Location: Rural Retreat va Posts: 24	Re: Yamaha G9 start problem. I found a white wire with a black stripe I believe it is and its broken off at the connector. Going into the black box by the coil and gas tank. Could that cause it.

08-16-2018, 06:28 PM	#29
Cory1007 Not Yet Wild Join Date: Aug 2018 Location: Rural Retreat va Posts: 24	Re: Yamaha G9 start problem. Thanks for all the help guys I'm done messing with it I'm going to pull the motor an harness out an out a different motor in it. Found a nice predator for cheap so out with old in with new.

08-16-2018, 06:51 PM	#30
CP241 Nincompoop village idiot Join Date: Apr 2018 Location: Michigan Posts: 9,690	Re: Yamaha G9 start problem. lot less work to just repair the harness but good luck :)

Similar Threads
Thread	Forum
Yamaha 1982 G1 will not start reg problem.	Gas Yamaha
2004 G22 Yamaha, start and stop problem	Gas Yamaha
Yamaha G16 start problem	Gas Yamaha
Hot start problem	Gas EZGO
No start problem	Gas Club Car