Pontiac Fiero 1988 Service Manual page 1097

W I P E R / W A S H E R P U L S E
(Continued from previous page)
SYMPTOM TABLE
With the Wiper
Switch in PULSE,
push Washer Switch
to ON for one or two
seconds
The Washer sprays
the windshield as
long as the Washer
Switch is held ON
The Wipers run at
low speed during
spray period and
continue running for
approximately 6
seconds after the
Washer stops
The Wipers return
to pulse operation
Turn the Wiper
Switch to LO
The Wipers run
continuously at low
speed
Turn the Wiper
Switch to HI
The Wipers run at a
faster speed
Turn the Wiper
Switch to OFF
The Wipers return to
the park position at
low speed
Turn the Wiper
Switch to MIST
The Wipers make
one complete stroke
and then park
• Refer to System Diagnosis when a result is
not normal.
S Y S T E M DIAGNOSIS
• Do the tests listed for your symptom in the
Symptom Table below.
• Tests follow the Symptom Table.
SYMPTOM
DO TEST
Wipers do not
operate in any mode
A: Wiper/Washer
Battery Voltage
Tfest
B: Wiper Motor
Module Input
Voltage Test
No delay in pulse
mode
C: Wiper/Washer
Pulse Control
Resistance Tfest
Wipers will not shut
off
Wipers run at high
speed only (low
speed inoperative)
B: Wiper Motor
Module Input
Voltage Test
Washer will not
operate
B: Wiper Motor
Module Input
Voltage Test
D Washer Pump
Test
Wipers run at low
speed only,high
speed inoperative
B Wiper Motor
Module Input
Voltage Test
A: WIPER/WASHER BATTERY
VOLTAGE T E S T
Measure: VOLTAGE
At: WIPER/WASHER SWITCH CONNECTOR
C207 (Disconnected)
Condition:
• Ignition Switch: ACCY
Measure
Between
D (WHT) &
Ground
Correct
Voltage
Battery
For Diagnosis
Seel
• If the voltage is correct, return to the
Symptom Table.
1. Check the WIPER Fuse and the WHT
(93) wire for opens.
B: WIPER MOTOR MODULE
INPUT VOLTAGE T E S T
Measure: VOLTAGE
At: WIPER MOTOR MODULE CONNECTOR
(Connected)
Condition:
• Ignition Switch: ACCY
Measure
Between
Correct
Voltage
For Diagnosis
• Wiper Switch: ANY POSITION
A (WHT) &
Ground
Battery Seel
• Wiper Switch: MIST, LO, or HI
C (GRY) &
Ground
Battery See 2
• Wiper Switch: HI
D (PPL) &
Ground
Battery See 3
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