BRAKE INDICATOR LIGHT WILL NOT LIGHT WITH PARKING BRAKE APPLIED.

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.