WORK LIGHTS WILL NOT LIGHT.

TM 5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

ELECTRICAL SYSTEM (CONT)

69. WORK LIGHTS WILL NOT LIGHT.

NOTE

Vehicle MASTER disconnect switch must be ON, ignition switch set to ON, and

master light switch set to STOP LIGHT. Failure to do so will cause erroneous

results.

Refer to wiring diagram for all wiring repair steps.

Disconnect connector A (1) and check for +24 VDC between wire 421 (2)

Step 1.

and ground.

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

step 5.

If +24 VDC is present, reconnect connector A and go to step 2.

Step 2. Disconnect connector X (3) and check for +24 VDC between wire 421 (2)

and ground.

If +24 VDC is not present, repair wiring 421 between

connector X and connector A.

If +24 VDC is present, reconnect connector X and go to step 3

Step 3. Loosen nut (4), remove knob (5) and nut (6), and pull work light switch (7)

out of cabinet (8) through opening.

Step 4. Install jumper wire across terminals on work light switch (7) and check if

work lights are lit.

If work lights are not lit, repair wiring 421 between work light

switch and work lights.

If work lights are lit, replace work light switch (page 4-162).

Step 5. Check for +24 VDC between wire 421 (2) and ground at fuse box 1 (9).

If +24 VDC is not present, replace fuse.

If +24 VDC is present, repair wiring 421 between fuse box 1

and connector A.