Unit Troubleshooting (Contd)
TEST OR INSPECTION
10. FUEL GAGE DISPLAYS READING OF MORE THAN 3/8-TANK FULL AND STATUS
INDICATOR ALARM AND LIGHT ARE ON (Centd)
Using multimeter, measure voltage at cable W66, pin E.
If multimeter displays correct voltage (fig 3-3),
replace faulty harness assembly (para 3-20).
If multimeter does NOT display correct voltage (fig 3-
3), go to step 7.
Reconnect cable W66 to connector 12J2 on tach/hourmeter
Check T connection on cable assembly W66 at wires 28 and
11. FURL GAGE
If T connections are loose, tighten connections.
If T connections are NOT loose, replace faulty T
connector or cable assembly W66 (para 3-26).
END OF TESTING
DISPLAYS READING OF LESS THAN AN EIGHTH TANK FULL AND STATUS
ALARM AND LIGHT DO NOT COME ON (REFER TO FIGURES 3-l THRU
HMMWV engine has been running 10-15 minutes. Both
light and alarm tests on status indicator are normal.
When measuring voltage, measure against ground.
Before starting procedure, see para 1-1.
Step 1. Disconnect cable W64 from connector 12J1 on tach/hourmeter
Check status indicator alarm and fuel light.
If alarm and fuel light are on, go to step 3.
If alarm and fuel light are not on, refer to system
manual for further troubleshooting.