95 G14E Controller and Diode HELP!!!!

[steele]

Throttle sensor is new(installed by prev owner) Solonoid was cooked New now. Wiring at solonoid is correct. Runs wide open as soon as solonoid comes on.Fwd or rev SAME SPEED. Unhook all connectors and still same no change . Can Faulty Controller or Diodes cause this.Or should I look elsewhere?Any help is appreciated. Thanks Rick

[scottyb]

Sounds like controller throttle input not compatible with the carts throttle output?

[smallblock450sl]

The diodes just let current flow in one direction, don't think that would be the problem, but you can check them with a volt meter set on continity (I like the beep mode), you should have continuity with leads hooked to the 2 posts, then switch leads and there shouldn't be any continuity. Is the controller stock Yamaha? Is the poentiometer a sock Yamaha?

[steele]

Originally Posted by smallblock450sl

The diodes just let current flow in one direction, don't think that would be the problem, but you can check them with a volt meter set on continity (I like the beep mode), you should have continuity with leads hooked to the 2 posts, then switch leads and there shouldn't be any continuity. Is the controller stock Yamaha? Is the poentiometer a sock Yamaha?

As far as I can tell the controller is original.I can see a #JN4**** Something number on the case so I think it is Yamaha.The throttle sensor has been replaced. The plug and wiring colors are right.I unplugged all 3 multi wire connectors at the same time and still when the sol comes on it s full wide open.With none of the small wires going to the controller hooked up.Should it still be able to full speed the motor?Checked the throttle sensor with VOM and ohms vary,but not sure values are correct.If the diodes are bad can they back feed the controller and cause it to go wide open even if the harness going to it with the small wires is unplugged?