B3722
B3722 - Rear Wiper Relay Drive Circuit LowSchematic:
CIRCUIT DESCRIPTION
When operation of the rear wiper is selected, battery voltage from the rear wiper switch is applied to the rear wiper input of the body control module (BCM) circuit 94. The BCM responds by switching circuit 2445 to ground. This action energizes the rear wiper relay, providing power to the rear wiper motor.
DTC PARAMETERS
^ Ignition is in RUN or ACC position
^ Circuit 2445 is shorted to ground or open
^ Output is Off
^ Service (wrench) light will illuminate.
DIAGNOSTIC AIDS
^ Check for poor connection at the BCM. Inspect harness connectors for backed out terminals, improper terminal mating, broken connector locks, improperly formed or damaged terminals and poor terminal-to-wire connection (terminal crimped over wire insulation and not conductors).
^ If circuit 2445 is open, no rear wipers.
^ If circuit 2445 shorted to ground, rear wipers are always On.
^ Inspect wiring harness for damage. Check for broken or chaffed insulation.
^ If fault is suspected to be intermittent, wiggling harness wiring may help in locating fault.
TEST
Diagnostic Chart:
