TM 9-2320-289-34
Table 2-2. Electrical Troubleshooting (Con’t)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
9.
WIPER SWITCH “OFF,” WIPER BLADES DO NOT RETURN TO PARK POSITION
Step 1.
Turn key to “RUN” position, Turn wiper switch to “OFF” position. Connect jumper
wire between park switch terminals (black/light blue lead terminal and white lead
terminal beside it) on wiper motor,
If wiper motor runs, replace park switch, (See paragraph 10-8)
If wiper motor does not run, trace circuit through black/light blue lead from
wiper motor to switch, (See wiring diagram E-20 or E-21)
10. WIPER WILL NOT TURN OFF
Step 1.
Turn key to “RUN” position. Turn wiper switch to “OFF” position. Disconnect
connector from park switch terminals (black/light blue lead terminal and white lead
terminal beside it) on wiper motor.
If wiper motor stops, replace park switch. (See paragraph 10-8)
If wiper motor still runs, perform step 2.
Step 2.
Disconnect 3-wire connector from windshield wiper motor. Connect 12 volt power
source to windshield wiper motor terminal #l.
If wiper motor does not run, trace all 3 circuits from 3-wire connector at wiper
motor to switch for short to ground, (See wiring diagram E-20 or E-21)
If wiper motor still runs, remove end cap assembly from wiper motor. (See
paragraph 10-8) Check for ground between brushes in end cap assembly.
Replace brushes if grounded.
11. WIPER OPERATES IN ONE SPEED ONLY (SAME SPEED IN “LO” AND “HI”)
Step 1.
Disconnect 3-wire connector from wiper motor, Operate wiper in “LO” and “H1.”
If wiper operates correctly in each wiper position, trace circuit from 3-wire
connector to switch. (See wiring diagram E-20 or E-21)
If wiper does not operate correctly in each wiper position, remove end cap
assembly from wiper motor. (See paragraph 10-8) check for short between
brushes in end cap assembly. Replace brushes if shorted.
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