I have a morbark wood chipper with a 4.5l John Deere engine 143hp that has a toggle swith to lift/decrease the engine revs,It stopped working the other day and would only idle.Swapped the toggle button for a new one and did nothing it has 2 wires running to the button down to the ECM. anyone had experiences with this type of thing it has me beat!
I don't know what inputs the ECM would require to change speeds 9050B. It could be voltage input, could be ground input. If you don't get any info, the best I could advise is trace the wiring that works your toggle switch, see if it's a positive voltage circuit or a ground circuit. It may be it's a positive circuit and it's not getting power. I hope you get it sorted out.
Well it ended up being the switch that was a no brainer,But a resistor in the circuit box was blown it had power going to the switch just none getting to the ECM
Well, good to hear ya got it sorted out. And it didn't empty your wallet.