but chatter, lift, or do not clear the glass, clean and inspect the wiper and washer system components as required.
(Refer to 8 - ELECTRICAL/FRONT WIPERS/WASHERS - CLEANING) and (Refer to 8 - ELECTRICAL/FRONT WIP-
ERS/WASHERS - INSPECTION).
The hard wired rear wiper and washer system circuits and components may be diagnosed and tested using con-
ventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information
includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention,
connector pin-out information and location views for the various wire harness connectors, splices and grounds.
However, conventional diagnostic methods may not prove conclusive in the diagnosis of the steering control module
(SCM), front control module (FCM), integrated power module (IPM), power distribution center (PDC), controller area
network (CAN) data bus, or the electronic message inputs or outputs used to provide wiper and washer system
service or many of the electronic features of the front wiper and washer system. The most reliable, efficient, and
accurate means to diagnose the SCM, FCM, IPM, PDC, CAN data bus and the electronic message inputs and
outputs for the front wiper and washer system requires the use of a diagnostic scan tool. Refer to the appropriate
diagnostic information.
CLEANING - WIPER & WASHER SYSTEM
WIPER SYSTEM
CAUTION: Protect the rubber squeegees of the wiper blades from any petroleum-based cleaners, solvents,
or contaminants. These products can rapidly deteriorate the rubber squeegees.
The squeegees of wiper blades exposed to the elements for a long time tend to lose their wiping effectiveness.
Periodic cleaning of the squeegees is suggested to remove any deposits of salt or road film. The wiper blades,
arms, and windshield glass should only be cleaned using a sponge or soft cloth and windshield washer fluid, a mild
detergent, or a non-abrasive cleaner. If the wiper blades continue to leave streaks, smears, hazing, or beading on
the glass after thorough cleaning of the squeegees and the glass, the entire wiper blade assembly must be
replaced.
WASHER SYSTEM
CAUTION: Never introduce petroleum-based cleaners, solvents, or contaminants into the washer system.
These products can rapidly deteriorate the rubber seals and hoses of the washer system, as well as the
rubber squeegees of the wiper blades.
CAUTION: Never use compressed air to flush the washer system plumbing. Compressed air pressures are
too great for the washer system plumbing components and will result in further system damage. Never use
sharp instruments to clear a plugged washer nozzle or damage to the nozzle orifice and improper nozzle
spray patterns will result.
If the washer system is contaminated with foreign material, drain the washer reservoir by removing the windshield
washer pump from the reservoir. Clean foreign material from the inside of the washer pump inlet filter screen and
the washer reservoir using clean washer fluid, a mild detergent, or a non-abrasive cleaner. Flush foreign material
from the washer system plumbing by first disconnecting the washer hoses from the washer nozzles, then running
the washer pump to run clean washer fluid or water through the system. Plugged or restricted washer nozzles
should be carefully back-flushed using compressed air. If the washer nozzle obstruction cannot be cleared, replace
the washer nozzle.
8R - 34
FRONT WIPERS/WASHERS - SERVICE INFORMATION
WK