TM 5-2420-231-23-1
0049
Table 1. Rear Window Wiper Does Not Function Correctly - Continued.
049
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 11. Test Rear Window
Rear Window Wiper Does
Wiper High Speed Circuit for a Short
Not Function Correctly -
to Ground.
Continued
1. Remove instrument panel right-
side covers (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 A 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 12. Test for Faulty 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).
4. Place rear window wiper switch in
the high-speed position (TM 5-
2420-231-10).
5. Using a digital multimeter, mea-
Voltage 10 to 14 Volts - Proceed to
sure voltage between cab wiring
step 6.
harness connector (WP 0007, Fig-
Voltage Less Than 10 Volts - Place
ure 127) terminal A and machine
rear window wiper switch in the off
ground. Voltage should be 10 to 14
position (TM 5-2420-231-10).
volts.
Proceed to Test Step 13.
6. Using a digital multimeter, mea-
Voltage 10 to 14 Volts - Replace rear
sure voltage between cab wiring
window wiper motor (WP 0343).
harness connector (WP 0007, Fig-
Proceed to Test Step 20.
ure 127) terminal A and Terminal
Voltage Less Than 10 Volts - Replace
AA. Voltage should be 10 to 14
cab wiring harness (WP 0181).
volts.
Proceed to Test Step 20.
0049-10
