• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print

Home > Ordnance Documents and other related manuals > > Lighting  System. - OD161680057
Figure 3. Starting System Schematic - OD161680056
Figure 4. Lighting System Schematic

Troubleshoot The High Mobility Multi- Purpose Wheeled Vehicle (HMMWV)
Page Navigation
  47    48    49    50    51  52  53    54    55    56    57  

TROUBLESHOOTING THE HMMWV - OD1616 - LESSON 1/TASK 2
Step 7.
Disconnect the negative battery cable from the battery and
disconnect  the  protective  control  box  cannon  plugs  from  the
protective control box.  Reconnect the negative battery cable to the
battery.
Now check pin E of the engine wiring harness cannon plug
for battery voltage.
If voltage is present, check for continuity
from pin G on the protective control box wiring harness cannon plug
to lead 11A of the rotary switch.  If continuity is present, replace
the protective control box following the procedures in paragraph 4-5
of the TM.
If continuity is not present, repair the body wiring
harness following the procedures in paragraph 4-62 of the TM.  If the
wiring harness cannot be repaired, notify IDS/IGS maintenance.
d.
Lighting  System.
While  reading  through  these  paragraphs
concerning troubleshooting the lighting system, refer to figure 4 on
the following page.
Troubleshooting the Malfunction:
LAMPS WILL NOT LIGHT.
Step 1.  Begin by positioning the light switch to the circuit being
tested.
Now check for battery voltage at the sockets.
If battery
voltage is present, replace the bulb with a bulb known to operate.
If the bulb does not light, check for corroded connections, loose
lamp  sockets,  or  damaged  wire  terminals.
Repair  or  replace  any
damaged components.
Step 2.
Disconnect the body wiring harness from the light switch.
Using a multimeter, check for battery voltage at terminal F in the
body wiring harness.
If battery voltage is not present, repair the
body wiring harness following the procedures in paragraph 4-62 of the
TM.
If  the  wiring  harness  cannot  be  repaired,  notify  IDS/IGS
maintenance.
Step 3.
Working from the circuit chart (table 1, on page 53),
connect a jumper wire from terminal F to the terminal of the circuit
being tested.
If the lamps light with the jumper wire connected,
replace  the  main  light  switch  using  the  procedures  contained  in
paragraph 4-45 of the TM.
If the lamps do not light, repair or
replace the
51






Western Governors University

< Previous Page
Index ^
Next Page >

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.