TROUBLESHOOTING THE HMMWV - OD1616 - LESSON 1/TASK 2
Troubleshooting the Malfunction:
OIL PRESSURE GAGE INOPERATIVE.
Disconnect lead 36A from the oil pressure sending unit.
Turn the rotary switch to the RUN position.
The oil pressure gage
should indicate the maximum pressure. Touch lead 36A to ground; the
If the oil
pressure gage operates correctly, proceed to step 3. If the gage did
not operate correctly, proceed to the next step.
Disconnect leads 36A, 27H, and 58G from the oil pressure
gage. Using a multimeter, check for battery voltage at lead 27H with
the rotary switch in the RUN position.
from lead 58G to ground, and continuity through lead 36A.
leads test correctly, replace the oil pressure gage following the
procedures in paragraph 4-13, page 4-26 of the TM. If any lead does
not test correctly, repair the body wiring harness following the
procedures contained in paragraph 4-62, page 4-110 of the TM. If the
wiring harness is beyond repair, notify IDS/IGS maintenance.
Remove the oil pressure sending unit.
Using a mechanical
gage, check the oil pressure.
If the oil pressure is 6-15 psi at
idle, replace the oil pressure sending unit following the procedures
in paragraph 4-25, page 4-43 of the TM. If the oil pressure is less
than 6 psi, notify IDS/IGS maintenance.
Windshield Wiper/Washer System.
While reading through these
paragraphs concerning troubleshooting malfunction(s) in this system,
refer to figure 6 (on the following page).
Troubleshooting the Malfunction: WINDSHIELD WASHER INOPERATIVE (WIPER
MOTOR OPERATES PROPERLY).
Step 1. Blow through the hoses and nozzles to check for blockage(s).
Replace any blocked hoses following the procedures in paragraph 10-
50, page 10-74 of the TM, or nozzles by following the procedures
contained in paragraph 10-51, page 10-75 of the TM.