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 7445 to ground. This action energizes
the rear wiper relay, providing power to the rear wiper motor.
DTC Parameters
| • | The ignition is in the RUN or ACC position. |
| • | Circuit 7445 is shorted-to-battery voltage. |
Diagnostic Aids
| • | When a shorted-to-battery voltage condition exists in circuit 7445
and the BCM has been requested to activate the front wiper relay, the BCM will attempt
to switch circuit 7445 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. |
| • | Check for a poor connection at the BCM. Inspect the 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). |
| • | Inspect the wiring harness for damage. Check for broken or chaffed insulation. |
| • | Review all fail information as this may assist in determining the conditions
when the fault occurs. |
| • | If a fault is suspected to be intermittent, wiggling the harness wiring
may help in locating the fault. |
