1993 DODGE TRUCK overdrive switch

8E
- 18
INSTRUMENT PANEL
AND
GAUGES
—
•

Fig.
3 Overdrive
Lockout
Switch
and
Message
Center
Module
J918E-32

Fig.
4
Message
Center Printed Circuit
Board—Automatic
Transmission

INSTALLATION
(1) Position lockout switch into module and push
until retaining tabs lock into place.
(2) Connect switch connector.

(3)
Install instrument cluster bezel to panel.

MESSAGE
CENTER MODULE
(Fig. 3) REMOVAL (1) Remove map lamp.
(2) Remove cluster bezel (refer to Cluster Bezel Re­
moval).
(3)
Reach behind bezel and disconnect lockout
switch (if equipped) and message center connectors.

(4)
Remove 3 module retaining screws and one clip
and pull module from bezel.

(6)
Install cluster bezel.

(7)
Check operation of switch.
POWER MIRROR SWITCH Refer to Group 8T - Power Mirrors
CARGO LAMP SWITCH

REMOVAL
(1) Locate chime module. Grasp chime module and
twist it to remove it from the bracket. (2) Remove wiring connector from cargo lamp
switch.
(3)
Depress lock tabs on switch and push it out of
the instrument panel.

INSTALLATION
(1) Hold wiring connector in switch opening.
(2) Push switch on to wiring connector.

(3)
Continue to push until switch snaps into place.

(4)
Install chime module on to bracket.
MAP LAMP SWITCH

REMOVAL
(1) Remove 2 attaching screws.
(2) Drop assembly down and remove wiring con­
nector, then remove map lamp assembly.

INSTALLATION
(1) Connect wiring connector to lamp assembly. (2) Position map lamp assembly to panel and in­
stall 2 mounting screws.
GLOVE BOX LAMP SWITCH

REMOVAL
(1) Open glove box until stops in bin rest against
instrument panel.
(2) Depress stops to clear instrument panel and
continue pivoting glove box assembly downward.

(3)
Disconnect wire to switch.

(4)
Snap switch out of panel.

INSTALLATION
(1) Snap switch into panel.
(2) Connect wire to switch.

(3)
Depress stops and close glove box door.
OVERDRIVE LOCKOUT SWITCH (FIG. 3)

REMOVAL
(1) Remove map lamp.
(2) Remove cluster bezel (refer to Cluster Bezel Re­
moval).
(3)
Reach behind bezel and disconnect lockout
switch connector.

(4)
Depress retaining tabs on top and bottom of
switch and pull switch out of module.

•

INSTRUMENT PANEL
AND
GAUGES
8E - 19

MESSAGE
CENTER
PRINTED CIRCUIT BOARD
J918E-33

Fig.
5
Message
Center Printed Circuit
Board—Manual
Transmission

LOW FUEL MODULE
>

PRINTED CIRCUIT BOARD
J918E-34

Fig.
6
Message
Center Printed Circuit
Board—Diesel
(5) Remove overdrive lockout switch from module.

INSTALLATION
(1) Install overdrive lockout switch into module.
(2) Position module on bezel and install screws and

clip.

(3) Connect lockout switch and message center
connectors.
(4) Install instrument cluster bezel to panel.
(5) Install map lamp.

FUSE
BLOCK AND
FLASHERS

FUSE
BLOCK
The fuse block is located directly below the steer­
ing column, on the lower steering column cover.

REMOVAL
Push fuse block locking tab on column cover down­
ward and lower fuse block. The following components
plug into the fuse block.
• Fuses. • 30 amp circuit breakers.
• Turn signal flasher. • Horn relay.
• Hazard Warning Flasher.

INSTALLATION
(1) Position fuse block to steering column cover. (2) Push locking tab to lock fuse block in position.

HOOD
RELEASE

REMOVAL
(1) Disengage cable from hood latch in engine com­
partment. (2) Remove 4 screws holding handle assembly to
instrument panel.
(3) Remove assembly by pulling cable rearward
through dash panel grommet.

INSTALLATION
(1) Feed cable assembly forward through dash
panel grommet.
(2) Mount handle assembly to instrument panel
with four screws.
(3) Connect cable to hood latch.

FOUR
WHEEL
DRIVE
INDICATOR
REMOVAL
(1) Remove map lamp.
(2) Remove cluster bezel (refer to Cluster Bezel Re­
moval).
(3) Remove 2 screws and remove indicator from be­
zel (Fig. 7).
o

J928E-48

Fig.
7
Four
Wheel
Drive Indicator
Bezel

CAVITY

FUSE/

COLOR ITEMS FUSED
CAVITY
FUSE/

COLOR ITEMS FUSED
10
11
12
13 2 AMP
GY VEHICLE SPEED CONTROL
5 AMP TN
GAUGES,
BRAKE WARNING LAMP, SEAT BELT WARNING
LAMP, BUZZER, LOW OIL LAMP, CHECK ENGINE LAMP,
ANTI-LOCK LAMP, TAILGATE OPEN LAMP, 4WD LAMP, O/D MODULE, LOW FUEL LAMP,
WAIT
TO START LAMP
WATER-IN-FUEL LAMP 14
3 AMP
VT
20 AMP YL BACK-UP LAMP, HEATED REAR WINDOW
15 10 AMP
RD
ILLUMINATION
LAMPS, A/C HEATER LAMP, ASH
RECEIVER LAMP, RADIO LAMP, TRANSMISSION
OVERDRIVE SWITCH LAMP, TACHOMETER LAMP, HEATED REAR WINDOW SWITCH LAMP.
RADIO AND CLOCK MEMORY, POWER MIRRORS, GLOVE BOX LAMP, DOME LAMP, READING LAMP, MAP LAMP,
CARGO LAMP,
IGNITION
SWITCH LAMP, UNDERHOOD LAMP
20 AMP YL FUSE CAVITY #14,
TAIL
LAMPS, PARKING LAMPS, SIDE

AAARKER
LAMPS, LICENSE LAMPS, FRONT AND REAR CLEARANCE LAMPS, RADIO INTENSITY, HORNS
20 AMP YL STOP LAMPS, KEY-IN & HEADLAMP ON BUZZER, RWAL
MODULE 30 AMP
CIRCUIT

BREAKER
TURN

SIGNAL
FLASHER 20 AMP
YL POWER DOOR LOCKS
15 AMP
BL
CIGAR LIGHTER
10 AMP RD RADIO AND CLOCK
20 AMP YL
TURN
SIGNALS, TACHOMETER PROVISION,
RWAL MODULE
20 AMP YL WINDSHIELD WIPERS
30 AMP LG A/C - HEATER BLOWER MOTOR
30 AMP
C/BRKR
POWER WINDOWS
20 AMP YL HAZARD FLASHER
AMPS

FUSE
COLOR
2 GY GRAY
3 VT

VIOLET

5 TN
TAN
10 RD
RED
15
BL
BLUE
20 YL YELLOW
30 LG
LIGHT
GREEN HAZARD
FLASHER
J938W-94

Fig. 12 Fuse Block and
Relay
Bank

CLUTCH PEDAL POSITION
SWITCH TO RADIO
TO
MAP LP , TQ R,GHT

TO
MESSAGE
CENTER
\ \
DOOR WIRING
TO A/C-HTR
WRG

TO
HTR SW LP'

(2-WAY
CONN)1 TO PRINTED
CIRCUIT BOARD TO REAR

SPEAKERS

TO BODY WIRING
LIFTGATE AJAR
LAMP

VIEW
N

(CLUTCH
PEDAL POSITION SWITCH) CLUTCH

PEDAL

TO RADIO
TO CIGAR LIGHTER TO
CHASSIS

CONN (R.W.A.L.;
TO
LEFT
DOOR SWITCH
INSTRUMENT
PANEL

INTERMITTENT

WIPER CONTROL TO STOP LAMP
&
BRAKE
SW

(DIESEL)
TO TRANSMISSION
OVERDRIVE
SWITCH
TO
MESSAGE
CENTER 4WD
INDICATOR VIEW
IN
DIRECTION
OF ARROW
S
VIEW
P

(R.W.A.L. DATA LINK CONNECTOR) VIEW
IN
DIRECTION
OF ARROW
R 25
n
o
>
a
>

2

m
J938W-96
Fig.
12 instrument
Panel
Wiring

8W - 20 WIRING
DIAGRAMS

•

TRANSMISSION OVERDRIVE MODULE

TRANSMISSION
OVERDRIVE
SWITCH (GAS)

A/C­

HEATER

MODE SWITCH
TO TRANSMISSION
OVERDRIVE

SWITCH
(DIESEL)

J938W-98

Fig. 15 A/C-Heater Wiring
Fig.-16 Underhood Lamp Wiring

8W
- 40
WIRING DIAGRAMS

Wiring Diagram Name Sheet Number

Oil-Gas
Engine
28

Temperature-Diesel Engine
. . . ., 27
Temperature-Gas Engine
. .28

Sensors
Camshaft Position
. . .20

Crankshaft Position
. .
.18,25

Engine
Coolant
Temperature
20
Electronic
Vacuum-Diesel Engine
. .34

Heated Oxygen
17
Intake
Air
Temperature
25

Map
20

Rear
Wheel Anti-Lock Brake 32,34

Throttle
Position
with
Diesel Engine
26
Vehicle Speed .20,25 Water
In
Fuel-Diesel Engine
25

Solenoids
EMCC
Solenoid
11, 12

EVAP
Purge
with
Gas
Ignition
.16

Exhaust
Gas
Recirculating
Gas Engine
.16

Fuel
.24

Transmission Overdrive
12,14

Speakers
62,64

Splices
Splice AO 1,2,4,6
Splice
A3
30,47
Splice
A4 39

Splice A21
16,23

Splice A21-1
. .68

Splice
A21-2 24
Splice A21-3
21

Splice A142
.15

Splice
A142-1 15

Splice
C4
.67,69
Splice
C7
.67,69
Splice
E2
.48,52,61,63,65
Splice F21
. , 71
Splice
F35 73

Splice
G5
12,13,14,58,77,78 Splice
G7
........... .19,25
Splice G7-1
. . .20

Splice
K4
20,26 Splice K4-1
.... ..... ; . 18,20

Splice
K6 , 20
Splice
K7 .20

Splice
L1 .79

Splice
L6 . .50

Splice
L7
43,45
Splice L7-1 40,41,47,61,63,65
Splice
L7-2
.41,79
Splice
L7-3 .41
Splice
L7-4 41

Splice
L7-5 .41

Splice
L50
......
.
........... .32,34,36,38,56
Splice
M1
49,51,52,61,63,65,75 Splice M1-1
51

Splice
M2 . .49

Splice M2-1
.51

Splice
P33 . 74
Wiring Diagram Name Sheet Number
Splice
P34 .... .74

Splice T41 ..............
.9

Splice
V6 . .
.54,55
Splice
X2 . .30
Splice X2-1
. . . .
.79,81
Splice X2-4
41
Splice X2-5
.41

Splice X2-6
.... .41
Splice X2-7
80,81

Splice X53
.65
Splice
X54
..........
. . 65

Splice Z1-1
.48
Splice Z1-2 48,52
Splice Z1-3
. . 48

Splice Z1-4
...
.44,46
Splice
Z1-5 ..... . . . .
-43,45
Splice Z1-6
11,23
Splice
Z1-7 .
.41,79
Splice Z1-8 77,78 Splice Z1-9
. .
............ .71,73,75
Splice Z1-10
. 71,73

Splice Z1-11 .77,78
Splice Z11
23

Splice
Z12 ' 17

Splice Z12-1
17,23

Steering Column Connector
.
87,88
Stereo Radio 61,63,65
Stop
Lamp Switch 32,34
Stop/Turn System
.56

Switches
A/C
Low
Pressure
with
Gas Engine
67
A/C
Low
Pressure
with
Diesel Engine
70

A/C
Heater Blower
with
Diesel Engine
69

A/C
Heater Blower
with
Gas Engine
67

A/C
Vacuum
with
Diesel Engine
69

A/C
Vacuum
with
Gas Engine
67
Automatic
Transmission
Neutral
Start
with
Diesel Engine
. .7

Automatic
Transmission
Neutral
Start
with
Gas Engine
. . .9
Back-Up
Lamp
.7,9

Brake Warning Lamp Diesel Engine
34

Brake Warning Lamp Gas Engine
. .32

Cargo
Lamp
49

Clutch
8

Clutch
Cycling
...
.68,70 Dimmer-Headlamp
47

Dome
Lamp-Front
. .50

Dome
Lamp-Rear
50

Door
Jamb
. 49
Engine
Coolant Temp
.26

Four
Wheel Drive
13

Front
Axle
13

Glove
Box
Lamp
. .52

Hazard Warning
.56

Headlamp
1,47

Heated Rear Window
39
Heater
. .
.66,67
Horn
.30
Ignition
2,10

WIRING
DIAGRAMS
SW - 41

Wiring
Diagram Name _ Sheet Number

Illumination
Lamps-Instrument Panel ........... .12,14

Intermittent
Wiper ......................... .53

Key-In
. . . . . . . .49
Liftgate
Ajar
............................ .51

Park
Brake
.31,33

Power
Door Lock-Left ....................... .73

Power
Door Lock-Right .74

Power
Mirrors .75,76

Power
Window-Left 71
Power
Window-Right . .72

Seat
Belt
Warning
with
Diesel Engine 77
Seal
Belt
Warning
with
Gas Engine .78

Speed
Control
........... ,32,36,38

Standard
Windshield Wiper . .55
Stop
Lamp .32,34,36,38
Transfer
Case
Switch . 13
Transmission
Thermo ....................... .24
Turn Signal .56
Windshield Washer
Intermittent
Wiper . .53
Windshield Washer-Standard .55 Windshield
Wiper-Intermittent
53

Stereo
Radio-4 Speakers .61,62,63,64

Fuse
.61,63

Speaker-Left ......... ............ 62,64

Speaker-Right
. .62,64

Stereo
Radio-Dual Speakers .65
Temperature Sending
with
Diesel Engine . .27
Temperature Sending
Unit
with
Gas Engine .......... .28

Trailer
Tow Wiring 81

Transmission
Overdrive Solenoid ............... .12,14

Transmission
Overdrive System 12,14
Wiring
Diagram Name ^ Sheet Number

2-Speed
Wiper Motor 55
Washer
Pump
Motor
....................... .55
Switch 55
Turn
Signal
System
.......................... .56

Flasher
56
Fuse
.56

Lamps-Front
43,44,45,46

Lamps-Rear
. 79,80,81
Switch
Control
56

Underhood
Lamp 29

Valve
Hydraulic, Dual Solenoid .32,34
Vehicle
Speed
Control
(Diesel) .37,38
Clockspring 42 Connector .37
Fuse
................................. .38

Lamp
Switch . . .38

Resistor
.38

Servo
• .37
Vehicle
Speed
Control
(Gas) .35,36
Clockspring 36
Connector .35
Fuse
......... 36
Lamp
Switch .36

Resistor
.36

Servo
. 35
Vehicle
Speed
Sensor
.20,25,26 Wide Open
Throttle
Cutout Relay . .68,70
Windshield
Wiper-intermittent
...... ....... .53,54
Windshield Wiper-Standard 55

8W
- 42
WIRING DIAGRAMS

-J_
ENGINE

=
GROUND

BODY
—
GROUND
BATTERY
-A
15
22WT-
^—
FUSIBLE LINK
(22WT)

(LEFT
FRONT WHEELHOUSE) FUSIBLE LINK

(18GY)

(LEFT
FRONT WHEELHOUSE)
All

6BK/GY FUSIBLE LINK

{1000)50/120 AMP

(LEFT
FRONT WHEELHOUSE) A15
16PK

13#-ZI

L9
18BK WT

i

HAZARD
FLASHER
SH
56
IT-
FUSE
#13
20 AMP
O
FUSE
#4

|
ft 20 AMP

F33

18PK
RD
A3
12RD WT A3
12RD WT

4-
CHARGING
SYSTEM

SH
3,4,5.6

FUSE
#6 20 AMP
FUSE
#5
J—1| 20 AMP
F33

18PK
RD

HORNS
SH
30
POWER DOOR LOCKS

SH
73
CIRCUIT

BREAKER
HEADLAMP

•VWf
SWITCH
EI

18TN
SH
47

-L2 HEADLAMPS
DIMMER SWITCH
SH
47
F32

18PK

DB

I

STOP LAMPS
SH
79,80

KEY-IN
I

HEADLAMP
ON
BUZZER

SH
77.78

REAR
WHEEL ANTI-LOCK
SH
31.33
FUSE
#15
10 AMP
L7
18BK/YL-

3
FUSE
#14

D 3AMP

E2

200R
X

CLUSTER LAMPS
SH
59

RADIO LAMPS
SH
61.63.65

A/C
AND
HEATER CONTROL LAMP
SH
48

ASH
RECEIVER LAMP
SH
48

TACHOMETER LAMP
SH
48

TRANSMISSION OVERDRIVE INDICATOR LAMP
SH
12

HEATED REAR WINDOW SWITCH LAMP
SH
39
PARKING LAMPS

SH
43.44.45,46
TAIL
LAMPS
SH
79.80

LICENSE
LAMP
SH
80

FRONT SIDE MARKER
LAMPS

SH
43.44.45.46

RADIO DISPLAY INTENSITY
SH
61.63.65

CLEARANCE
AND

IDENTIFICATION
LAMPS
SH
40.41
UNDERHOOD LAMP

SH
29

GLOVE
BOX
LAMP
SH
52

RADIO ELECTRONICS
SH
61.63.65
MAP LAMP
SH
49

IGNITION

SWITCH LAMP
SH
49

DOME LAMP
SH
50.51

CARGO
LAMPS
SH
49.50

POWER MIRRORS
SH
75

A31
14BK/WT
-
7*3
LI FUSE
#7

2h-i
15 AMP

F30

16RD TN

1

CIGAR LIGHTER
SH
52
AD
1
FUSE
APPLICATION CHART

J938W-U