PASSENGER SIDE WINDSHIELD HEATER WILL NOT OPERATE.

5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

ELECTRICAL SYSTEM (CONT)

49. PASSENGER SIDE WINDSHIELD HEATER WILL NOT OPERATE.

NOTE

Make sure driver side windshield heater is turned on first.

If not, passenger side

windshield heater will not operate.

Perform the following steps only after proper operation of driver side windshield

heater has been verified.

Refer to wiring diagram (page 3-162) for ail wiring repair steps.

Step 1. Pull windshield heater control switch 1 (1) and then switch 2 (2) and verify

lamp (3) is lit.

If lamp is lit, go to step 3.

If lamp is not lit, go to step 2.

Step 2. Check for +24 VDC between wire 627 (4) and ground at windshield heater

control switch 2 (2).

If +24 VDC is not present, repair wiring 627 between

windshield heater control switch 1 and switch 2.

If +24 VDC is present, replace lamp (3) and go to step 3.

Step 3. Check for +24 VDC between wire 625 (5) and ground at windshield heater

control switch 2 (2).

If +24 VDC is not present, replace windshield heater control

switch 2 (page 4-139).

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

Step 4. Disconnect connector N (6) and check for +24 VDC between wire 625 (5)

and ground.

If +24 VDC is not present, repair wiring 625 between

windshield heater control switch 2 and connector N.

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

Step 5. Check for +24 VDC between wire 625 (5) and ground at relay K4 (7).

If +24 VDC is not present, repair wiring 625 between

connector N and relay K4.

+24 VDC is present, go to step 6.

Step 6. Check for +24 VDC between wire 621 (8) and ground at relay K4 (7).

+24 VDC is not present, replace relay K4.

+24 VDC is present, go to step 7.