Electrical: Run away cart, what just happened and why

[rockfordpi]

Been fighting for a couple of weeks now to get a g29 to do anything (someone even worse than me worked on it before I did).

Put power straight to motor and verified motor good. Key switch is good, tun tow good. I Put in a new controller. Still no click on Solenoid. Verified solenoid was good. Traced out all of the circuits and found power to/on the red (control) wire of the solenoid primary when I checked it back to negative, but no power on the other (black) control wire that goes to the plug on the wiring harness.

So, being tired and frustrated (not a good combo). I jumpered the terminal with the black control wire over to negative battery. When I did, cart took off wide open in reverse. Nearly ran over me. The odd thing was, as soon as the cart moved, I removed the jumper wire, yet the cart kept going wide open.

Well, at least I know now the cart will run, LOL. Can someone explain to me what happened (other than what usually does when someone does something stupid) and why and possibly what this tells me about the problem with the cart.

Please correct me if I am wrong, but it seems to me that this indicates a problem with my accelerator or accelerator switch?