TM 10-3930-675-24-1
TROUBLESHOOTING PROCEDURES (NON-ERROR CODE) - CONTINUED
0007 00
Table 2. Electrical Troubleshooting Procedures (Non-Error Code) - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
13.Rear Windshield Wiper Motor Not Working -
b. If no voltage (24V) is found at
Continued.
X9 pin 1 or 2 while operating
the rear wiper control switch,
check rear wiper switch for
damage and continuity and
check continuity of wires 91,
92, 93, 94, and A94 (WP 0048
00-38).
c. Replace damaged or faulty rear
wiper switch (WP 0073 00).
d. Repair or replace damaged
wires or connectors (WP 0113
00).
4. Inspect intermittent relay 321- a. If no voltage (24V) is found at
2 for damage. Disconnect relay
321-2 pin 3 or 5, check
plug and check voltage (24) at
continuity of wires A91, A92,
pin 3 and 5 with the ignition on
A93, A138, A136, A246, and
while operating the rear wiper
A84B (WP 0048 00-38).
control
switch
to
the b. Replace damaged or faulty
INTERMITTENT position.
relay (WP 0074 00).
c. Repair or replace damaged
wires or connectors (WP 0113
00).
5. Remove the cover to gain a. If no voltage (24V) is found at
access to the rear windshield
XS5 pin 2 or 3, check
wiper motor at rear of cab (WP
continuity of wires 136, 137,
0158 00). Inspect wiper motor
and 138 (WP 0048 00-38).
for damage and wiring b. Check ground connection at
connections. Unplug wiper
wiper motor. Check continuity
motor and check voltage (24V)
of wire 135 and ground
at XS5 pin 2 and 3 with the
connection at 37-1 (WP 0048
ignition on while operating the
00-38).
rear wiper control switch to the c. Repair or replace damaged
CONTINUOUS position.
wires or connectors (WP 0113
00).
d. Replace damaged or faulty rear
wiper motor (WP 0158 00).
0007 00-42
