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 1445 to ground. This action energizes the
rear wiper relay, providing power to the rear wiper motor.
Conditions for Setting the DTC
| • | Ignition is in RUN or ACC position |
| • | Circuit 1445 shorted to battery voltage |
| • | Service (wrench) light will illuminate |
Diagnostic Aids
| • | When a shorted to battery voltage condition exists in circuit 1445 and
the BCM has been requested to activate the rear wiper relay, the BCM will attempt
to switch circuit 1445 to ground. High current flow will result and the BCM output
will go into a protective state. The BCM output will not allow itself to be activated
for as much as 3 minutes. |
| • | Review all fail information as this may assist in determining the conditions
when the fault occurs. |
| • | 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. |
| • | The rear wipers are inoperative. |
| • | Check for poor connection at the BCM. Inspect harness connections for
backed out terminals, improper terminal mating, broken connectors locks, improperly
formed or damaged terminals and poor terminal-to-wire connection (terminal crimped
over wire insulation not conductors). |
