Im working on a Crown 33RRTT that wont move. The fwd/rev contactors wont close so I checked the operator and brake switched and they are working properly. I checked the control lever switches and they are working. I checked for signal going to the contactor to trigger it but its not getting any signal. I don't no where any of the switch wires go to nor where the contactor wires come from.

Any assistance would be greatly appreciated