Chrysler RAM TRUCK 2500 1994 Service Manual page 474

WINDSHIELD WIPER AND WASHER SYSTEMS 8K - 5
WINDSHIELD WIPER FUNCTION AND SWITCH TESTING PROCEDURES
MULTI-FUNCTION SWITCH TESTING PROCEDURES
The multi-function switch contains circuitry for:
• turn signal
• hazard warning
• headlamp beam select
• headlamp optical horn
• windshield wiper
• pulse wipe
• windshield washer.
This integrated switch assembly is mounted to the
left-hand side of the steering column. Should any
function of the switch fail, the entire switch assembly
must be replaced.
To test the switch:
(1) Disconnect negative cable from battery.
(2) Remove tilt lever (tilt column only).
(3) Remove upper and lower column covers to gain
access to the switch connector (Fig. 1).
UPPER SHROUD GROUND
UPPER
FIXED SHROUD
SUPPORT BRACKET
WIRE HARNESS
CONNECTOR
WASHER
LOWER
SHROUD
LOWER
FIXED
SHROUD
J9119-22
Fig. 1 Steering Column Cowers
(4) Remove lower fixed column cover.
(5) Loosen steering column upper bracket nuts. Do
Not remove nuts.
(6) Move upper fixed column cover to gain access
to rear of multi-function switch.
(7) Remove switch connector (Figs. 2 and 3).
(8) Using an ohmmeter, test for continuity (no re­
sistance) between the terminals of the switch as
shown i n the continuity chart.
(9) Refer to Service Procedures for assembly.
STEERING
C O L U M N
ASSY.
J918J-1
MULTI-
F U N C T I O N
SWITCH
CONNECTOR
TURN S I G N A L
SWITCH A N D
LEVER
Fig. 2 Multi-Function Switch Connector
KEY-IN SWITCH &
H A L O LIGHT
MULTI-FUNCTION
SWITCH
I G N I T I O N
SWITCH
TURN S I G N A L
SWITCH & LEVER
SPEED
CONTROL
J918J-2
Fig. 3 Steering Column Connectors
INTERMITTENT WIPER FUNCTION TESTING
PROCEDURES
These tests involve disconnecting the intermittent
wipe control module. The module is located on the in­
strument panel support bracket behind the knee
blocker (Fig. 4).
CONDITION
Excessive delay (more than 30 seconds) or in­
adequate variation in delay.
PROCEDURE
Variations i n delay should be as follows:
(1) Minimum delay (delay control to extreme coun­
terclockwise position before first detent) 1/2 to 2 sec­
onds.
(2) Maximum delay (delay control to extreme clock­
wise position before off detent) 10 to 30 seconds.
(3) I f there is excessive delay or no variations i n
delay proceed to intermittent wipe switch test.