DIAGNOSIS AND TESTING
WINDSHIELD WIPER/WASHER SYSTEM
Windshield Wiper System
Whenever a windshield wiper or washer system malfunction occurs, disconnect the harness connections and clean
the terminals. Ensure the wire harness is properly connected before starting diagnosis and repair procedures. For
complete windshield wiper/washer schematics and diagrams, see wipers/washers electrical diagnostics in this sec-
tion. (Refer to 8 - ELECTRICAL/WIPERS/WASHERS - SCHEMATICS AND DIAGRAMS).
Wiper System Diagnosis
CONDITION
POSSIBLE CAUSES
CORRECTION
WIPER ARM(S) CHATTER
ON WINDSHIELD.
1. Permanent set of blade element
edge.
1. Inspect rubber element for
permanent set. If not OK,
replace rubber element.
2. Bent or damaged blade structure.
2. Inspect blade. If not OK,
replace blade.
3. Bent or damaged arm.
3. Inspect arm. If not OK, adjust
blade to arm clearance. See
procedure in this section.
Reinspect, if not OK, replace
arm.
DRIVER AND/OR
PASSENGER ARM WILL
NOT CYCLE (OPERATE).
1. Loose arm to pivot shaft.
1. Check arm to pivot shaft
connection for looseness.
Torque attachment nut to
specification.
2. Stripped arm to pivot shaft.
2. Check arm to pivot shaft for
stripping. Torque nut to
specification. If not OK, replace
arm, pivot shaft or both.
DRIVER AND/OR
PASSENGER ARM OR
BLADE HITS COWL
GRILLE OR WINDSHIELD
MOLDINGS.
1. Arm(s) out of position.
1. Remove arm off pivot shaft,
cycle module to park.
Reposition arm/blade to
location marks on windshield.
Secure arm to pivot shaft and
torque to specification. recheck
wiper arm travel.
WIPER BLADE(S)
STREAK.
1. Contamination on blade element
or windshield.
1. Clean blade element edge
with mild soap or alcohol and
water. Clean windshield with
mild soap or non-abrasive
cleanser and water. Check for
proper wipe quality. If not OK,
replace blade element.
2. Blade element damaged.
2. Replace blade element.
ZH
WIPERS/WASHERS - SERVICE INFORMATION
8R - 33