point. A resistor is connected in parallel with the relay coil in the relay, and helps to dissipate voltage spikes and
electromagnetic interference that can be generated as the electromagnetic field of the relay coil collapses.
The wiper on/off relay terminals are connected to the vehicle electrical system through a connector receptacle in the
Power Distribution Center (PDC). The inputs and outputs of the wiper on/off relay include:
•
Common Feed Terminal - The common feed terminal (30) is connected to the common feed terminal of the
wiper high/low relay at all times through the wiper on/off relay output circuit.
•
Coil Ground Terminal - The coil ground terminal (85) is connected to a control output of the Front Control
Module (FCM) through a wiper on/off relay control circuit. The FCM controls wiper motor operation by control-
ling a ground path through this circuit.
•
Coil Battery Terminal - The coil battery terminal (86) receives battery current at all times from a fuse in the
PDC through a fused ignition switch output (run-acc) circuit.
•
Normally Open Terminal - The normally open terminal (87) receives battery current at all times from a fuse
in the PDC through a fused ignition switch output (run-acc) circuit, and provides battery current to the wiper
on/off relay output circuit whenever the relay is energized.
•
Normally Closed Terminal - The normally closed terminal (87A) is connected to ground at all times through
a take out of the headlamp and dash wire harness with an eyelet terminal connector that is secured by a
screw to the front end sheet metal, and is connected to the wiper on/off relay output circuit whenever the relay
is de-energized.
The wiper on/off relay may be diagnosed using conventional diagnostic tools and methods. However, conventional
diagnostic methods may not prove conclusive in the diagnosis of the ElectroMechanical Instrument Cluster (EMIC),
the FCM, or the electronic message inputs to or outputs from the EMIC and the FCM that control the operation of
the wiper on/off relay. The most reliable, efficient, and accurate means to diagnose the wiper on/off relay, the EMIC,
the FCM, or the electronic message inputs and outputs related to the wiper on/off relay operation requires the use
of a diagnostic scan tool. Refer to the appropriate diagnostic information.
RESERVOIR-WASHER
DESCRIPTION
The molded plastic washer fluid reservoir is integral to the engine coolant overflow bottle located on the left end of
the air conditioning condenser module in the left front corner of the engine compartment. A single washer fluid res-
ervoir is used for both the front and rear washer systems.
A bright yellow plastic filler cap with a rubber seal and an International Control and Display Symbol icon for “Wind-
shield Washer” and the text “Washer Fluid Only” molded into it snaps over the open end of the filler neck. The cap
hinges on and is secured to a molded-in hook formation on the top of the reservoir just behind the filler neck when
it is removed for inspecting or adjusting the fluid level in the reservoir.
There are separate, dedicated holes on the lower rearward facing side of the reservoir provided for the mounting of
the washer/pump motor unit and the washer fluid level switch. A snap post receptacle for the washer pump is
molded into the reservoir to allow for mounting of the washer pump/motor unit without the use of fasteners.
The washer reservoir is serviced only as a unit with the engine coolant reserve bottle. The washer reservoir cannot
be repaired and, if faulty or damaged, the coolant reserve bottle/washer reservoir unit must be replaced. The grom-
met seals for the washer pump/motor unit and the washer fluid level switch, and the filler cap are each available for
individual service replacement.
OPERATION
The washer fluid reservoir provides a secure, on-vehicle storage location for a large reserve of washer fluid for
operation of the front and rear washer systems. The washer reservoir filler neck provides a clearly marked and
readily accessible point from which to add washer fluid to the reservoir.
The washer/pump motor unit is located in a sump area near the bottom of the reservoir to be certain that washer
fluid will be available to the pump as the fluid level in the reservoir becomes depleted. The washer fluid level switch
is mounted just above the sump area of the reservoir so that there will be adequate warning to the vehicle operator
that the washer fluid level is low, before the front washer system will no longer operate. The ElectroMechanical
Instrument Cluster (EMIC) is programmed to suppress rear washer system operation upon illumination of the low
washer fluid indicator so that the front washers can remain operational until the fluid level can be replenished.
HB
FRONT WIPERS/WASHERS - SERVICE INFORMATION
8R - 55