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TM 5-2420-224-20-1
Table 3-5. Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
ELECTRICAL SYSTEM (CONT)
54. BRAKE INDICATOR LIGHT WILL NOT LIGHT WITH PARKING BRAKE APPLIED.
NOTE
Refer to wiring diagram (page 3-174) for all wiring repair steps.
Step 1. Pull instrument cluster panel light (1) out of dashboard (2).
Step 2. Remove brake indicator lamp (3) and check for continuity.
If there is no continuity, replace lamp.
If there is continuity, go to step 3.
NOTE
Vehicle MASTER disconnect switch must be ON and master light switch set to
PANEL BRT. Failure to do so will cause erroneous results.
Perform steps 3 thru 6 with parking brake applied.
Step 3. Check for +24 VDC between wire 372 (4) and ground at instrument cluster
panel light (1).
If +24 VDC is not present, repair wiring 372 between
instrument cluster panel light and fuse box 1.
If +24 VDC is present, go to step 4.
Step 4. Disconnect connector C (5) and check for +24 VDC between wire 332 (6)
and ground.
If +24 VDC is not present, repair wiring 332 between
connector C and instrument cluster panel light.
If +24 VDC is present, reconnect connector C and go to step 5.
Step 5. Disconnect connector AF (7) and check for +24 VDC between wire 332 (6)
and ground.
If +24 VDC is not present, repair wiring 332 between
connector C and connector AF.
If +24 VDC is present, reconnect connector AF and go to
step 6.
Step 6. Check for +24 VDC between wire 333 (8) and ground at parking brake
switch (9).
If +24 VDC is present, replace parking brake switch
(page 4-210).
If +24 VDC is not present, repair wiring 333 between
connector AF and parking brake switch.
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