TM 5-3805-280-24-1
Sub-System Diagnostics
ENGINE COOLANT
YES: Gauge has failed.
TEMPERATURE GAUGE
Replace.
RESISTOR (150 OHMS)
(R4) CHECK
NO: Gauge resistor has
failed. Replace.
T118391 UN21NOV98
NOTE: Check engine coolant temperature gauge before checking resistor. Resistor is
located on bottom of the monitor controller panel. Access resistor by removing bottom
cover from monitor controller panel.
Connect ohmmeter to resistor terminals.
Does ohmmeter read about 220 ohms?
9015
15
67
1/1
NOTE: Check engine coolant temperature gauge before
ENGINE COOLANT
YES: Sender is OK.
checking resistor.
TEMPERATURE SENSOR
Check harness.
(B9) CHECK
Disconnect harness from temperature sender.
NO: Sender has failed.
Replace.
Connect ohmmeter to sender and ground.
Start engine and observe ohmmeter.
T8359AJ
UN10NOV94
Does ohmmeter reading decrease as engine becomes
warmer?
1/1
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