ELECTRICAL TROUBLESHOOTING
TM 5-3805-263-14&P-3
EM8 PANEL
TROUBLESHOOTING
Brake Pressure Indicator
If brake pressure is above about 65 psi (450 kPa) and indicator is ON do the
following:
1. Remove Y wire from the air pressure switches and put it to machine ground. The
indicator must turn OFF.
Indicator Turns ON
Indicator Does Not Turn ON
Either the switch (or switches) or ground is bad. Go
There is either an open wire in the harness or the
to Step 2.
operator panel is bad. Go to Step 3.
2. Check for continuity across the switches with a continuity tester or a digital
Continuity
No Continuity
If there is continuity across the switch, then the
Replace switch (or switches).
ground for the switch (or switches) is bad. Replace
harness or connect another ground wire to the switch.
3. Check for continuity through harness from the switch to the operator panel. Fasten Y
wire for the switch to machine ground. Disconnect the harness plug from the
operator panel and check for continuity at the plug connection (8) that is grounded.
Use a continuity tester or a digital multimeter.
Continuity
No Continuity
Replace operator panel.
Use electrical schematic or simplified schematic to
find a broken wire. Replace wire or harness.
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