TM 5-2420-231-23-1
0047
Table 1. Front Windshield Wiper Does Not Function Correctly - Continued.
047
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Resistance 5.0 Ohms or Less - Install
3. Using a digital multimeter, mea-
Front Windshield Wiper
wipers fuse (TM 5-2420-231-10).
sure resistance between terminals
Does Not Function Correctly
Proceed to Test Step 22.
of wiper fuse. Resistance should
- Continued
be 5.0 ohms or less.
Resistance Greater Than 5.0 Ohms -
Proceed to Test Step 20.
Test Step 20. Test for Faulty Front
Windshield Wiper Motor.
1. Remove headliner from cab (WP
0346).
2. Disconnect two front windshield
wiper motor (WP 0007, Figure 63)
connectors from front lights wiring
harness connector (WP 0007, Fig-
ure 62).
3. Turn front windshield wiper switch
to the off position (TM 5-2420-231-
10).
4. Using a digital multimeter, test for
Continuity - Proceed to Test Step 21.
continuity between front lights wir-
No Continuity - Replace front
ing harness connector (WP 0007,
windshield wiper motor (WP 0342).
Figure 62) terminals D and AA.
Install new wipers fuse (TM 5-2420-
There should be no continuity.
231-10).
Proceed to Test Step 26.
Test Step 21. Test Front Windshield
Wiper Park Circuit for a Short to
Ground.
1. Remove instrument panel front
covers (WP 0174).
2. Disconnect front console wiring
harness connector (WP 0007, Fig-
ure 5) from front main chassis wir-
ing harness connector (WP 0007,
Figure 6) (WP 0162).
3. Using a digital multimeter, test for
Continuity - Replace front console
continuity between front console
wiring harness (WP 0162).
wiring harness connector (WP
Connect all wiring harness connectors.
0007, Figure 5) terminal 6B and
Install new wipers fuse (TM 5-2420-
machine ground. There should be
231-10).
no continuity.
Proceed to Test Step 26.
No Continuity - Proceed to step 4.
4. Remove front floor cover plate
(WP 0306).
5. Disconnect front lights wiring har-
ness connector (WP 0007, Figure
64) from main chassis wiring har-
ness (WP 0007, Figure 65) (WP
0183).
0047-14