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RIGHT FRONT AUXILIARY HEADLIGHT LOW BEAM WILL NOT LIGHT.
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TM-5-2420-224-20-1 Tractor Wheeled 4x4 DED Small Emplacement Excavator (SEE) and High Mobility Material Handler (HMMH) Manual
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ELECTRICAL SYSTEM (CONT) -680640223
TM 5-2420-224-20-1
Table 3-5. Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
ELECTRICAL SYSTEM (CONT)
Step 1. Check for +24 VDC between wire 42LR (1) and ground at auxiliary headlight
connector (2).
If +24 VDC is not present, go to step 4.
If +24 VDC is present, go to step 2.
Step 2. Remove two bolts (3), lamp guard (4), mount (5), and lamp (6).
Step 3. Check for +24 VDC between wire 42LR (1) and ground at socket (7).
If +24 VDC is present, replace lamp.
If +24 VDC is not present, repair wiring 42LR between socket
and auxiliary headlight connector.
Step 4. Check for +24 VDC between wire 42LR (1) and ground at auxiliary light
control switch (8).
If +24 VDC is present, repair wiring 42LR between auxiliary
headlight connector and auxiliary light control switch.
If +24 VDC is not present, go to step 5.
Step 5. Check for +24 VDC between wire 41LR (9) and ground at auxiliary light
control switch (8).
If +24 VDC is present, replace auxiliary light control switch
(page 4-146).
If +24 VDC is not present, go to step 6.
Step 6. Disconnect connector G (10) and check for +24 VDC between wire 41LR (9)
and ground.
If +24 VDC is present, repair wiring 41LR between connector G
and auxiliary light control switch.
If +24 VDC is not present, reconnect connector G and go to
step 7.
Step 7. Check for +24 VDC between wire 41LR (9) and ground at fuse box 2 (11).
If +24 VDC is present, repair wiring 41LR between fuse box 2.
and connector G.
If +24 VDC is not present, repair wiring 41LR at fuse box 2.
3-92

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