TM 5-2420-231-23-1
0049
Table 1. Rear Window Wiper Does Not Function Correctly - Continued.
049
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. Disconnect two rear window wiper
Rear Window Wiper Does
motor connectors (WP 0007, Fig-
Not Function Correctly -
ure 128) from cab wiring harness
Continued
connector (WP 0007, Figure 127).
3. Turn rear window wiper switch to
the off position (TM 5-2420-231-
10).
4. Using a digital multimeter, test for
Continuity - Proceed to Test Step 4.
continuity between cab wiring har-
No Continuity - Replace rear window
ness connector (WP 0007, Figure
wiper motor (WP 0343).
127) terminals B and AA. There
Install new wipers fuse (TM 5-2420-
should be no continuity.
231-10).
Proceed to Test Step 20.
Test Step 4. Test Rear Window Wiper
Low-Speed Circuit for a Short to
Ground.
1. Remove instrument panel right-
side cover (WP 0176).
2. Disconnect side console wiring
harness connector (WP 0007, Fig-
ure 130) from cab wiring harness
connector (WP 0007, Figure 129)
(WP 0181).
3. Using a digital multimeter, test for
Continuity - Replace cab wiring
continuity between cab wiring har-
harness (WP 0181).
ness connector (WP 0007, Figure
Install new wipers fuse (TM 5-2420-
127) terminal B and machine
231-10).
ground. There should be no conti-
Proceed to Test Step 20.
nuity.
No Continuity - Replace side console
wiring harness (WP 0170).
Install new wipers fuse (TM 5-2420-
231-10).
Proceed to Test Step 20.
Test Step 5. Test for Voltage to Rear
Window Wiper Motor.
1. Remove headliner from cab (WP
0346).
2. Disconnect two rear window wiper
motor connectors (WP 0007, Fig-
ure 128) from cab wiring harness
connectors (WP 0007, Figure
127).
3. Connect batteries (WP 0157) and
turn ignition switch to the on posi-
tion (TM 5-2420-231-10).
0049-4
