relay. If OK, check for faulty relays and go to Step 8.
If not repair as necessary.
(8) Disconnect the C3 bone 12-way connector from
the BCM.
(9) Using an ohmmeter, check for continuity from
terminal 4 of the BCM C3 24-way, black connector to
the terminal C of the intermittent wiper relay. If OK,
go to Step 10. If not repair as necessary.
(10) Using a voltmeter, connect positive lead to ter-
minal 8 of the BCM C2 black 24-way connector and
negative lead to ground. Turn ignition switch to the
ON position. Slowly move the wiper switch from OFF
position through each position to HIGH.
(a) If voltage increases from zero to approxi-
mately 10 volts in the HIGH position, replace
BCM. If no voltage, go to Step b.
(b) Using an ohmmeter, check for continuity
from terminal 3 of wiper switch connector to termi-
nal 8 of the BCM C2 black 24-way connector. If no
continuity, repair circuit. If OK, go to Step c.
(c) Using a voltmeter, connect positive lead to
terminal 1 of the wiper switch connector. If ignition
voltage is present, replace the wiper switch. If no
voltage, check continuity from fuse 5 to terminal 1
of the wiper switch connector. Repair circuit as
necessary.
(11) Disconnect motor connector and replace fuse 5
from the Junction Block.
(a) If fuse does not blow, go to Step 2.
(b) If fuse blows, wiper control circuit is at fault,
repair as necessary, refer to Group 8W, Wiring Dia-
grams.
MOTOR RUNS SLOWLY AT ALL SPEEDS
(1) Disconnect the wire harness from the wiper
motor. Remove wiper arms and blades. Disconnect
motor drive link from motor. Connect an ammeter
between battery negative jump start terminal and
Pin 5 on the wiper motor connector. Connect battery
positive wire to Pin 2 on the wiper motor connector.
When replacing motor crank nut tighten to 15-20
N·m (130-177 in. lbs.) torque.
(a) If average ammeter reading is more than 10
amps with a hot motor and dry windshield, replace
motor.
(b) If motor runs and average ammeter reading
is less than 10 amps, go to Step 2.
(2) Check to see if wiper linkage or pivots are
binding or caught.
MOTOR WILL RUN AT HIGH SPEED, BUT NOT
MOVE AT LOW SPEED. MOTOR WILL RUN AT
LOW SPEED, BUT WILL NOT MOVE AT HIGH
SPEED
(1) Disconnect motor connector.
(2) If motor will not run on low speed, connect a
jumper wire between battery positive jump start ter-
minal and Pin 2 on the wiper motor connector. Con-
nect a second jumper wire between ground and Pin 5
on the wiper motor wire harness connector.
(a) If motor runs, go to Step 3.
(b) If motor does not run, replace the motor.
(3) If motor will not run on high speed, connect a
jumper wire between battery positive terminal and
Pin 1. Connect a second jumper wire between ground
and Pin 5 of the motor connector.
(a) If motor runs, go to Step 4.
(b) If motor does not run, replace the motor.
(4) If wipers will not run at low speed, using an
ohmmeter, check for open circuit. Check between ter-
minal E of the HI-LO wiper relay to Pin 2 of the
wiper motor wire harness connector for continuity. If
OK, go to Step 5. If not repair circuit as necessary.
(5) If wiper will not run at the high speed, using
an ohmmeter, check for an open circuit. Check
between terminal D of the HI-LO wiper relay and
Pin 2 of the wiper motor wire harness connector for
continuity. If OK, go to Step 6. If not repair circuit as
necessary.
(6) Check for faulty HI-LO wiper relay.
WIPERS RUN AT HIGH SPEED WITH SWITCH IN
LOW SPEED POSITION. WIPERS OPERATE IN
INTERMITTENT MODE, BUT EACH WIPE IS AT
HIGH SPEED.
(1) Disconnect motor connector.
(2) Using two jumper wires, connect one between
the battery positive jump start terminal and Pin 2 on
the wiper motor connector. Connect the second lead
between ground and Pin 5 on the wiper motor con-
nector. If motor runs at low speed, go to Step 3. If
motor runs at high speed, replace the motor.
(3) Check for faulty HI-LO wiper relay. Check for
crossed wires in harness from HI-LO relay to motor.
(4) Disconnect C3 bone 12-way connector from the
BCM and remove the HI/LO wiper relay.
(5) Using an ohmmeter, check terminal 12 of the
C3 bone 12-way connector for short to ground.
(6) If continuity to ground is present, repair as
necessary. If no continuity to ground, replace the
BCM.
WIPERS RUN AT LOW SPEED WITH SWITCH IN
HIGH SPEED POSITION
(1) Check for faulty HI-LO wiper relay.
(2) Using an ohmmeter, check for open circuit
between terminal C of the HI-LO wiper relay and
terminal 12 of the BCM 33 bone 12-way connector. If
OK, go to Step 3. If not OK, repair as necessary.
(3) Check wiper switch.
(4) Check for binding linkage
LH WIPER AND WASHER SYSTEMS 8K - 7
DIAGNOSIS AND TESTING (Continued)
To Next Page
Loading...
