(CTM). If the Delay mode is selected, the control
knob can then be rotated to multiple minor detent
positions, which actuates a variable resistor within
the switch and provides a hard wired output to the
CTM that signals the desired delay interval for the
intermittent wiper feature.
• Turn Signal Control - The multi-function
switch control stalk actuates the turn signal switch.
When the control stalk is moved in the upward direc-
tion, the right turn signal circuitry is activated; and,
when the control stalk is moved in the downward
direction, the left turn signal circuitry is activated.
The multi-function switch turn signal circuitry pro-
vides a signal to the right or left turn signal sense of
the combination flasher to activate or deactivate the
flasher output to the proper turn signal lamps. The
turn signal switch has a detent position in each
direction that provides turn signals with automatic
cancellation, and an intermediate, momentary posi-
tion in each direction that provides turn signals only
until the multi-function switch control stalk is
released. When the control stalk is moved to a turn
signal switch detent position, the cancel actuator
extends toward the center of the steering column. A
turn signal cancel cam that is integral to the clock-
spring mechanism rotates with the steering wheel
and the cam lobes contact the cancel actuator when
it is extended from the multi-function switch. When
the steering wheel is rotated during a turning
maneuver, one of the two turn signal cancel cam
lobes will contact the turn signal cancel actuator. The
cancel actuator latches against the cancel cam rota-
tion in the direction opposite that which is signaled.
In other words, if the left turn signal detent is
selected, the lobes of the cancel cam will ratchet past
the cancel actuator when the steering wheel is
rotated to the left, but will unlatch the cancel actua-
tor as the steering wheel rotates to the right and
returns to center, which will cancel the turn signal
event and release the control stalk from the detent so
it returns to the neutral Off position.
• Washer Mode - Pushing the control knob on
the end of the multi-function switch control stalk
towards the steering column provides a battery cur-
rent output through the momentary single pole, sin-
gle throw washer switch circuitry to provide a
washer signal input to the CTM. The CTM then pro-
vides a battery current output to operate the washer
pump/motor. If the wipers are not operating when
the washer switch is actuated, the CTM will operate
the wiper motor for as long as the washer switch is
depressed plus about three additional wipe cycles. If
the wipers are operating in the intermittent mode
when the washer switch is actuated, the CTM will
operate the wiper motor at a fixed low speed for as
long as the washer switch is depressed plus about
three additional wipe cycles before the wipers return
to the selected intermittent wipe interval.
DIAGNOSIS AND TESTING - MULTI-FUNCTION
SWITCH
Refer to the appropriate wiring information. The
wiring information includes wiring diagrams, proper
wire and connector repair procedures, details of wire
harness routing and retention, connector pin-out
information and location views for the various wire
harness connectors, splices and grounds.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, SEAT BELT TENSIONER, OR INSTRU-
MENT PANEL COMPONENT DIAGNOSIS OR SER-
VICE. DISCONNECT AND ISOLATE THE BATTERY
NEGATIVE (GROUND) CABLE, THEN WAIT TWO
MINUTES FOR THE AIRBAG SYSTEM CAPACITOR
TO DISCHARGE BEFORE PERFORMING FURTHER
DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE
WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE
TO TAKE THE PROPER PRECAUTIONS COULD
RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND POSSIBLE PERSONAL INJURY.
(1) Remove the multi-function switch from the
switch mounting housing on the steering column.
(Refer to 8 - ELECTRICAL/LAMPS/LIGHTING -
EXTERIOR/MULTI-FUNCTION SWITCH - REMOV-
AL).
(2) Using an ohmmeter, perform the continuity
and resistance tests at the terminals in the multi-
function switch connector receptacle as shown in the
Multi-Function Switch Tests chart (Fig. 15).
(3) If the multi-function switch fails any of the
continuity or resistance tests, replace the faulty
switch unit as required.
REMOVAL
WARNING:
DISABLE
THE
AIRBAG
SYSTEM
BEFORE ATTEMPTING ANY STEERING WHEEL,
STEERING COLUMN, SEAT BELT TENSIONER, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. DISCONNECT AND ISOLATE THE BAT-
TERY NEGATIVE (GROUND) CABLE, THEN WAIT
TWO MINUTES FOR THE AIRBAG SYSTEM CAPAC-
ITOR TO DISCHARGE BEFORE PERFORMING FUR-
THER DIAGNOSIS OR SERVICE. THIS IS THE ONLY
SURE WAY TO DISABLE THE AIRBAG SYSTEM.
FAILURE TO TAKE THE PROPER PRECAUTIONS
COULD RESULT IN ACCIDENTAL AIRBAG DEPLOY-
MENT AND POSSIBLE PERSONAL INJURY.
8L - 20
LAMPS/LIGHTING - EXTERIOR
AN
MULTI-FUNCTION SWITCH (Continued)