RIGHT BLACKOUT BRAKE LIGHT WILL NOT LIGHT.

5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

ELECTRICAL SYSTEM (CONT)

64. RIGHT BLACKOUT BRAKE LIGHT WILL NOT LIGHT.

Vehicle MASTER disconnect switch must be ON and master light switch set to BO

DRIVE. Failure to do so will cause erroneous results.

Refer to wiring diagram (page 3-200) for ail wiring repair steps.

Remove two screws (1), two washers (2), and guard (3). Loosen six screws

Step 1.

(4) and remove retainer (5).

Step 2. Remove right blackout brake lamp (6) and check for continuity.

If there is no continuity, replace lamp.

If there is continuity, go to step 3.

Step 3. Disconnect connector B (7) and check for +24 VDC between wire 47 (8)

and ground.

If +24 VDC is not present, reconnect connector B and go to

step 6.

If +24 VDC is present, reconnect connector B and go to step 4.

Step 4. Disconnect connector Y (9) and check for +24 VDC between wire 47 (8)

and ground.

If +24 VDC is not present, repair wiring 47 between

connector Y and connector B.

If +24 VDC is present, reconnect connector Y and go to step 5.

Step 5. Check for +24 VDC between wire 47 (8) and ground at right blackout brake

light connector (10).

If +24 VDC is present, replace rear composite stoplight/taillight

(page 4-190).

If +24 VDC is not present, repair wiring 47 between right

blackout brake light connector and connector Y.

Step 6. Loosen two captive screws (11) and pull bracket (12) out enough to gain

access to area behind bracket.

Step 7. Remove two clamps (13) and pipe assembly (14).

Step 8. Disconnect connector M (15) and check for +24 VDC between wire 47 (8)

and ground.

If +24 VDC is present, repair wiring 47 between connector M

and connector B.

If +24 VDC is not present, reconnect connector M and go to

step 9.