TM 5-3805-263-14&P-3
ELECTRICAL TROUBLESHOOTING
EMS PANEL
Continuity
No Continuity
Replace the operator panel
Go to Step 2.
2. Disconnect the B/W wire from terminal 2 of the test switch. Check for
continuity across the test switch. Use a continuity tester or a digital multimeter
and hold the switch in the TEST position.
Continuity
No Continuity
Go to Step 3
Replace the test switch.
3. Check for continuity from terminal 1 to machine ground.
Continuity
No Continuity
Replace the harness
Replace the harness or connect a wire from terminal
1 of the test switch to machine ground.
PROBLEM C: ALL Indicators Are ON; Master Fault Light is OFF.
Possible Causes: a. The light bulb is bad.
b. The harness to the master fault light is bad.
c. The operator panel is bad.
TROUBLESHOOTING
1. Remove the red lens and the master fault light bulb. With a voltage tester or a
digital multimeter, check the master fault light receptacle for voltage (all
switches still in TEST 1 position).
Voltage
No Voltage
Make a replacement of the bulb
Go to Step 2.
2. Remove the LT GR/W wire and the B/W wire from the master fault light
receptacle. Check the wires for voltage with a voltage tester or a digital
multimeter (test switch in TEST position).
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