WINDSHIELD WASHER PUMP WILL NOT OPERATE.

TM 5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

ELECTRICAL SYSTEM (CONT)

34. WINDSHIELD WASHER PUMP WILL NOT OPERATE.

NOTE

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

windshield wiper/washer switch engaged. Failure to do so will cause erroneous

results.

Refer to wiring diagram for all wiring repair steps.

Check for +24 VDC between wire 638 (1) and ground at windshield washer

Step 1.

pump connector (2).

If +24 VDC is present, replace windshield washer pump

(page 4-484).

If +24 VDC is not present, go to step 2.

Disconnect connector F (3) and check for +24 VDC between wire 638 (1)

Step 2.

and ground.

If +24 VDC is present, repair wiring 638 between connector F

and windshield washer pump.

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

step 3.

Remove defroster nozzle (4) and hose (5).

Step 3.

Remove knob (6), nut (7), and windshield wiper/washer switch (8) from

Step 4.

dashboard (9).

Step 5.

Check for +24 VDC between wire 638 (1) and ground at windshield

wiper/washer switch (8).

If +24 VDC is not present, replace windshield wiper/washer

switch (page 4-132).

If +24 VDC is present, repair wiring 638 between windshield

wiper/washer switch and connector F.

3-126