TM 5-3805-263-14&P-3
OPERATOR'S STATION
4. Turn OFF the disconnect switch.
Make a replacement of the fuse for the operator panel.
Turn ON the disconnect switch and check the fuse.
Connect the harness plug to the operator panel and again check fuse
If the fuse burns out again:
Before Harness Plug is Connected
After Harness Plug is Connected
Harness has a short. Replace harness
Replace the operator panel.
5. Check the ground connection to the operator panel (Connection 2) with a
voltage testor or a digital multimeter. Check for voltage between connections
1 and 2 in the harness plug that connects to the operator panel. The ground
must be good for the voltage tester to show voltage.
If Ground Connection Is Good
If Ground Connection Is Not Good
Replace the operator panel
Use the simplified schematic for power to the opera-
tor panel to find the reason for no ground.
PROBLEM B: Only the Indicators Are ON That Are Normally ON With the Engine OFF.
Possible Caues:
a. Bad test switch.
b. Bad harness between the test switch and the operator panel.
c. Bad operator panel.
TROUBLESHOOTING
1. Disconnect the harness plug from the operator panel. Make sure the test
switch is in the TEST position. With a continuity testor or digital multimeter,
check for continuity through the test switch to ground, at connections 2 and
15 in the harness plug. Connection 2 is the ground for the operator panel and
connection 15 goes to the test switch.
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