Wiper Motor; Washer Pump; Wiper/Washer Multi-Function Lever - Pontiac Fiero 1988 Service Manual

WINDSHIELD WIPER SYSTEMS 8E2-5
diagnosis procedure, it is very important to confirm the
reported condition with a complete operational check
including the washer system. Then match up the
condition with one in the wiper diagnosis charts.
WIPER MOTOR
Check for motor operation before removing from
vehicle. Disconnect all wiring from wiper and perform
the following checks in this order:
1. If wiper motor functions in all above modes, go
to Wiper/Washer Multi-Function Lever Test
(Fig. 7).
2. If the motor does not function in any one of the
above checks, see Wiper and Washer Motor
Mechanical Diagnostic chart (Fig. 8).
WASHER PUMP
Check for washer pump operation before
removing from vehicle. Remove connector and apply
B(+) to # 2 wiring harness terminal (Fig. 9).
1. If motor does not run or pump water, replace
washer pump.
2. If motor runs and pumps water, problem is in
circuit board, motor park switch or wiper switch.
(See Wiper/Washer Multi-function Lever Test,
Fig. 7.)
WIPER/WASHER MULTI-FUNCTION LEVER
TEST
Disconnect wiring harnesses from wiper motor
and perform the following multi-function lever tests
using a digital voltmeter with ignition switch on. All
voltage readings taken with respect to vehicle ground.
To use Wiper/Washer Multi-function Lever
Check Chart (Fig. 11), probe terminals 1 through 4
with digital voltmeter and multi-function lever in
various positions.
If the Wiper/Washer Multi-function Lever Tests
are not completed correctly, then the multi-function
lever is defective. However, it is possible that the wiring
harness is defective and has an open or short (see
Wiper/Washer Electrical Diagnostic Chart, Fig. 8).
0
M I S T
0
o
F F / P A R K
4 3 2 1
n
m
12V
1 0 K O
TO
5 0 0 K O
12V
(4)
L O W
3 6 0
n
1/2 W
0 H I G H
\fft
360
1/2V\
<£>•
12V
* C O N N E C T TERMINAL # 3 B E F O R E
CONNECTING TERMINAL # 4
O T H E R W I S E DAMAGE TO P . C . BOARD
MAY O C C U R .
0 W A S H
Connect a test w a s h e r pump
(bottom-bottle-mount t y p e ) of proven
quality. Do not u s e pump of c a r .
T e s t w a s h e r pump should p u l s e
9 to 1 1 times in 15 s e c o n d s . Do not
hold WASH button longer than this
without a 2 minute p a u s e .
12V
12V
5B8E202
Fig. 6 Wiper On-Car C h e c k