Hi, There are 3 pins connected to the acc. potentiometer : one (X65:2) for GND, one ((X65:4) = 12 VDC and one (X65:5) = Acc. signal : Using the meter to connect between (X65:2) & (X65:5) it should be = 1.2 - 2.56 VDC when Acc. pedan in Zero, and 9.4-10.8 VDC when full pressing the pedal to max.
* Using the Ohm meter to connect between (X65:7) & (X65:9) loacted under the pedal to check the pedal sw => it must be = 0 Ohm when pressing the pedal.
* Using the Volt meter to connect between (X54:2) loacted around the foot SW against one of the positive pole to check the deadman/foor sw => it must have 0 VDC at this pin when pressing the foot sw.
* Using the Ohm meter to connect between (X51:4) against (X51:1) & (X51:2) located around the direction SW in order to check this sw => it must be = 0 Ohm when pressing the SW.
Let me know your checking results
Good luck and rgds