WINDSHIELD WIPER SYSTEM
An intermittent windshield wiper system is standard
equipment. This system lets the driver select
from either of two wiper speeds, or the intermittent
wipe mode. The intermittent wipe mode is provided
by delay logic and relay control circuitry contained
within the Body Control Module (BCM), and an
intermittent wipe relay.
The intermittent wipe mode delay times are speed
sensitive. Above about sixteen kilometers-per-hour
(ten miles-per-hour) the delay is driver adjustable
from about one-half second to about eighteen seconds.
Below about sixteen kilometers-per-hour (ten
miles-per-hour) the BCM doubles the delay time, or
provides delays of about one second to about thirtysix
Models equipped with the optional automatic headlamp
system have a programmable feature in the
BCM that will energize the headlamps automatically,
whenever the windshield wipers are turned on. Refer
to the proper Diagnostic Procedures manual for more
information on enabling or disabling this feature.
The windshield wipers will operate only when the
ignition switch is in the Accessory or On positions. A
circuit breaker located in the junction block protects
the circuitry of the windshield wiper system. Refer to
the owner’s manual for more information on the
windshield wiper system controls and operation.
So I gather from this that you have correctly deduced that the int. wiper goes thru the BCM, but have you swapped the relay?
Sorry i cant answer your question about the BCM
For your overhead display, try this
A self-diagnostic test is used to determine that the
trip computer, compass, thermometer, and all of the
display module segments are operating properly electrically.
Initiate the self-diagnostic test as follows:
(1) With the ignition switch in the Off position,
simultaneously press and hold the Step button and
the U.S./Metric button.
(2) Turn the ignition switch to the On position.
(3) Continue to hold both buttons until the display
module performs a display segment test. In this test,
all of the vacuum fluorescent display segments are
lighted. This test will:
a. Verify that all display segments are functional
b. Check the internal circuitry of the module
c. Check that all of the CCD data bus messages
needed are being received.
(4) Respond to the respective test results as follows.
If all tests are passed, the module will automatically
return to normal operation.
d. In the display segment test, if any segment
should fail to light the unit is faulty and must be
e. If the internal circuitry test is failed, the module
will display “FAIL”. If “FAIL” is displayed, the unit is
faulty and must be replaced.
f. If the CCD data bus message test is failed, the
module will display “CCD”. If “CCD” is displayed, the
use of a DRB scan tool and the proper Body Diagnostic
Procedures manual are required for further diagnosis.
(5) Momentarily depress and release either button
one time to exit the self-diagnostic test mode and
return the trip computer, compass, and thermometer
display module to normal operation.
Shutting the engine off should have no effect on the door locks