I am working on a Clark EM15 with a Cableform controller. when either forward or reverse direction is chosen the left side motor will not turn. The contactors are coming in for both motors for both forward or reverse. with the direction switch in neutral I can manually pull in the A1 contactor and either the forward or reverse contactor for the left motor and the motor runs at full speed. This is the first truck I have worked on with a Cableform controller and I do not have any information on it.

Thanks for any help.