TM 5-3610-253-14
If voltage is not present, check pin 1 of plug connector 108 for +24 V,
g.
WARNING
Always keep clear of moving parts while performing this task. Serious
injury may occur.
h. Check for +24 V at pin 4 of plug connector 104 when not using the
backgauge controls. When using backgauge control, verify that pin 4
drops to 0 volts.
5-536