Circuit Description
When intermittent or mist operation of the windshield wiper is selected, battery
voltage from the wiper switch is applied to the front wiper input of the body control
module (BCM). The BCM responds by switching circuit 1445 to ground. This action
energizes the front wiper relay, providing low speed operation of the wiper motor
during single swipes.
Control of the wiper during continuous LO or HI speed switch settings is direct
wired from the wiper switch to the wiper motor and is not under the control of the
BCM.
DTC Parameters
| • | The ignition is in the RUN or ACC position. |
| • | Circuit 1445, BCM is shorted-to-ground or open. |
Diagnostic Aids
| • | 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. |
| • | If a fault is suspected to be intermittent, wiggling the harness wiring
may help in locating the fault. |
