WINDSHIELD WIPERS WILL NOT OPERATE. cont'd -680640259

TM 5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

ELECTRICAL SYSTEM (CONT)

Step 3. Check for +24 VDC between wire 632 (7) and ground at windshield

wiper/washer switch (5).

If +24 VDC is not present, repair wiring 63 between windshield

wiper/washer switch and fuse box 1.

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

Step 4. Check for +24 VDC between wire 632 (7) and ground at windshield

wiper/washer motor connector (8).

If +24 VDC is not present, repair wiring 632 between

windshield wiper/washer motor and windshield wiper/washer

switch.

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

Step 5. Check for +24 VDC between wire 631 (9) and ground at windshield

wiper/washer switch (5).

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

switch.

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

Step 6. Check for +24 VDC between wire 631 (9) and ground at windshield

wiper/washer motor connector (8).

If +24 VDC is present, replace windshield wiper/washer motor

(page 4-477).

If +24 VDC is not present, repair wiring 631 between

windshield wiper/washer switch and windshield wiper/washer

motor. If problem continues, go to step 7.

NOTE

For steps 7 and 8, windshield wiper/washer switch must be pulled out twice to activate

delay/intermittent operation.

Step 7. Check for +24 VDC between wire 635 (10) and ground at windshield

wiper/washer switch (5).

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

switch.

If +24 VDC is present, go to step 8.

Step 8. Check for +24 VDC between wire 635 (10) and ground at windshield

wiper/washer switch relay connector (11).

If +24 VDC is present, replace windshield wiper/washer switch

relay (page 4-140).

If +24 VDC is not present, repair wiring 635.

3-129