Unit Troubleshooting (Contd)
TEST OR INSPECTION
COOLANT TEMPERATURES GAGE DISPLAYS COLD) ENGINE READING AND STATUS
INDICATOR ALARM AND LIGHT DO NOT COME ON (REFER TO FIGURES 3-1 THRU
HMMWV engine has been running 10 to 15 minutes.
light and alarm tests on status indicator are normal.
When measuring voltage, measure against ground.
Before starting procedure, see para 1-1.
Disconnect cable W64 from connector 12J1 on tach/hourmeter
Check alarm and TEMP light on status indicator.
If alarm and TEMP light is on, go to step 3.
If alarm and TEMP light is NOT on, fault is with
Report fault to DS maintenance.
Remove engine access cover and disconnect safety lanyard.
Under engine access cover, check T connection on cable
assembly W66 at wire 33A.
If T connection is loose, tighten connection.
If T connection is NOT loose, replace faulty T
connector or electrical gage (TM 9-2320-280-20).
END OF TESTING