Switch Test; Two Speed Wiper Switch Continuity Chart; Two Speed Wiper Motor Wiring Schematic - Dodge D150 1990 Service Manual

8K - 4 WINDSHIELD WIPER AND WASHER SYSTEMS •
TERMINALS
WIPER
MOTOR
BATTERY
"B + "
RR8KC6
Fig. 4 One Jumper Wire Between Terminal "P2" and
" L " . One Jumper Wire Between Terminal "P1 and
"B+"
PROCEDURE
(1) Remove motor w i r i n g connector and clean ter-
m i n a l s . Reconnect connector and test motor. I f prob-
l e m persists, proceed to step No. 2.
(2) P u t wiper switch to O F F position. Disconnect
motor w i r i n g connector. Connect a voltmeter or test
l a m p to t h e motor ground strap. Connect t h e other
lead t o t e r m i n a l " P I " of w i r i n g connector.
(a) I f voltage is not present, check for a n open
c i r c u i t i n t h e w i r i n g harness or w i p e r control
switch.
(b) I f voltage is present, proceed t o step (3).
(3) Connect a n ohmmeter or c o n t i n u i t y tester be-
tween t e r m i n a l s " L " and "P2" (Fig. 5).
OHMMETER TERMINALS
"L" "P
2
"
RR8KC7
Fig. 5 Ohmmeter Between Terminal "L" and "P2"
(a) I f there is continuity between these t e r m i -
nals, the problem is a defective motor.
(b) I f there is no continuity, t h e problem i s a n
open circuit i n the wiper control s w i t c h or w i r i n g
harness.
SWITCH TEST
To test the s w i t c h , first disconnect t h e s w i t c h wires
f r o m t h e body w i r i n g a t the connector. T h e n , u s i n g a
c o n t i n u i t y tester or an ohmmeter, test for c o n t i n u i t y
(no resistance) between t h e t e r m i n a l s o f the switch
as shown i n t h e following c o n t i n u i t y chart. The iden-
t i t y o f each t e r m i n a l is shown i n (Fig. 6).
_ — — ^ TO IGNITION
~ K U N & A C C Y
FUSE #6
(20 AMP)
TWO SPEED
WIPER SWITCH
(ON STEERING
COLUMN)
1
WINDSHIELD
IWASHER PUMP
AND MOTOR
PARK
SWITCH
J908K-35
Fig. 6 Two Speed Wiper Motor Wiring Schematic
For test purposes, the first (or clockwise) position is
the O F F position, w i t h L O W being t h e n e x t detent
position and H I G H being the last (counterclockwise)
detent position. I n any wiper mode, i f the knob is
pushed a l l t h e w a y i n , t h e washer c i r c u i t w i l l be
completed.
TWO SPEED WIPER SWITCH CONTINUITY CHART
Off Low High
B + to P, B + to P, B + to P,
LtoP
2
B + to L B + toH
H—Open P
2
—Open P
2
—Open
H—Open L—Open
B + toW B + to W B + toW
(In Wash) (In Wash) (In Wash)
J908K-20