Power Locks; Circuit Breaker Test; Voltage Test; Electric Motor Test - Dodge D150 1990 Service Manual

Rear wheel drive ram truck
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POWER LOCKS
8P - 1
POWER LOCKS
C O N T E N T S
SERVICE PROCEDURES
GENERAL INFORMATION
B o t h doors, w h e n
electrically
locked
or unlocked
electrically
switch o n a door panel.
Page
. . . 2
TEST PROCEDURES
Page
. . . 1
equipped,
can be
by operating t h e
B o t h doors can be locked or unlocked mechanically
w i t h t h e l o c k i n g knob regardless of electrical locking
and u n l o c k i n g actuation.
The r i g h t and left f r o n t door on a l l vehicles can be
locked or unlocked mechanically f r o m t h e outside
w i t h t h e k e y or electrically as described above. The
left door can also be unlocked by actuation of t h e i n -
side remote door handle.
CIRCUIT BREAKER TEST
T E S T P R O C E D U R E S
VOLTAGE TEST
Locate t h e c i r c u i t breaker i n fuse cavity number 10
on t h e fuse block. P u l l c i r c u i t breaker o u t s l i g h t l y
b u t be sure t h a t c i r c u i t breaker t e r m i n a l s s t i l l con-
tact t e r m i n a l s i n fuse block. Connect ground w i r e o f
voltmeter t o a good g r o u n d . W i t h probe o f voltmeter
positive w i r e , check b o t h t e r m i n a l s of c i r c u i t breaker
for battery voltage. I f only one t e r m i n a l checks a t
battery voltage, c i r c u i t breaker i s defective a n d must
be replaced. I f n e i t h e r t e r m i n a l shows battery volt-
age,
check for open
or shorted c i r c u i t t o circuit
breaker.
SWITCH TEST
For s w i t c h t e s t i n g , remove t h e switch f r o m i t s
m o u n t i n g location. U s i n g a n ohmmeter, refer t o (Fig.
1) t o determine i f c o n t i n u i t y is correct i n t h e Lock
and Unlock s w i t c h positions. I f these results are not
obtained, replace t h e s w i t c h .
SWITCH
POSITION
CONTINUITY
BETWEB4
OFF
PINS 1 & 4
PINS 2 & 5
LOCK
PINS 2 & 3
PINS 1 & 4
UNLOCK
PINS 3 & 4
PINS 2 & 5
The
following
w i r i n g test
sequence
determines
whether or n o t voltage is continuous t h r o u g h t h e
body harness to switch.
A f t e r removing switch from t r i m panel for testing
purposes, carefully separate m u l t i p l e t e r m i n a l block
on w i r i n g harness from switch body. Connect one
lead o f test l i g h t t o black w i r e t e r m i n a l a n d touch
other test l i g h t lead t o red w i r e t e r m i n a l . I f t h e test
l i g h t comes on, t h e w i r i n g circuit between t h e bat-
tery a n d switch is functional. I f l i g h t does n o t come
on, check 30 amp c i r c u i t breaker or for a broken
wire.
ELECTRIC MOTOR TEST
M a k e certain battery is i n normal condition before
circuits are tested.
To determine w h i c h motor is defective, check each
i n d i v i d u a l door for electrical lock and unlock or dis-
connect t h e motor connections one a t a t i m e , w h i l e
operating door lock switch. I n t h e event t h a t none o f
the motors w o r k , the problem may be caused b y a
shorted motor. Disconnecting the defective motor w i l l
allow t h e other to work.
Should the motor defect be a result o f a broken pig-
t a i l w i r e , i t should have no effect on t h e operation of
other motors.
PIN IDENTIFICATION
PIN SIDE OF SWITCH
898P-5
Fig. 1 Door Lock Switch Continuity

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