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Old 08-12-2019, 06:04 AM   #6
biphase
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Join Date: Jan 2009
Location: Ocala, FL
Posts: 384
Default Re: Yamaha G29 controller

I saw that you were reading a "negative" voltage at the key switch. That is not possible if your reference point is B- . Put the black lead of your voltmeter on B- at the battery pack and leave it attached there. Use the red lead to make all measurements. With the key "on", you should see +48V on both the red/yellow wire and the red/white wire on the key switch. The red/white wire goes from the key switch to pin 8 on the controller.
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