HAZARD WARNING LIGHTS WILL NOT LIGHT.

TM 5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

ELECTRICAL SYSTEM (CONT)

50. HAZARD WARNING LIGHTS WILL NOT LIGHT.

NOTE

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

light switch set to SER DRIVE, and hazard warning switch depressed. Failure to do

so will cause erroneous results.

Perform the following steps only after proper operation of turn signals has been

verified.

Refer to wiring diagram (page 3-166) for all wiring repair steps.

Remove hazard warning switch (1) and check for +24 VDC between wire 45

Step 1.

(2) and ground.

If +24 VDC is not present, repair wiring 45 between hazard

warning switch and fuse box 1.

If +24 VDC is present, go to step 2.

Step 2. Check for +24 VDC between wire 451 (3) and ground at hazard warning

switch (1).

If +24 VDC is not present, repair wiring 451 between hazard

warning switch terminals 15 and 30.

If +24 VDC is present, go to step 3.

Step 3. Check for +24 VDC at wire 46 (4) and wire 452 (5) and ground at hazard

warning switch (1).

If +24 VDC is not present, replace hazard warning switch.

If +24 VDC is present, go to step 4.

Step 4.

Check for +24 VDC between wire 461 (6) and ground at turn signal flasher

If +24 VDC is not present, replace turn signal flasher relay

(page 4-196).

If +24 VDC is present, go to step 5.

Step 5. Check for +24 VDC between wire 461 (6) and ground at hazard warning

switch (1).

If +24 VDC is not present, repair wiring 461 between turn

signal flasher relay and hazard warning switch.

If +24 VDC is present, go to step 6.