Circuit Description
The body control module (BCM) monitors the front washer motor circuit 228. When
a front windshield wash is requested for more than two minutes, circuit 228 at battery
voltage, the BCM will turn off the front wiper motor if the front wiper is NOT requested
by the wiper switch.
Battery Voltage for the front washer motor (and rear washer motor when equipped)
is supplied through the front wiper fuse and wiper switch. Grounding for the front
washer motor is through circuit 550 or through the OFF position of the rear washer
motor switch (when equipped).
Conditions for Setting the DTC
| • | Front washer circuit 228 at battery voltage for two minutes |
| • | Default turn Off washer motor after failing DTC if wiper input is not
active |
| • | No light will illuminate in I/P. |
Diagnostic Aids
| • | 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. |
| • | Cannot vary wiper speed. |
| • | 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). |
