DODGE RAM 2003 Service Repair Manual

RADIO (BASE) - GRAY 22 WAY
CAV CIRCUIT FUNCTION
1 M1 18PK FUSED B(+)
2 Y105 20BR/RD FUSED IGNITION SWITCH OUTPUT (RUN-ACC)
3 Y166 20OR/DB PANEL LAMPS DRIVER
4- -
5- -
6- -
7 X82 18LB/VT RIGHT FRONT DOOR SPEAKER (+)
8 X80 18LB/BK RIGHT FRONT DOOR SPEAKER (-)
9 X85 18LG/DG LEFT FRONT DOOR SPEAKER (-)
10 X87 18LG/RD LEFT FRONT DOOR SPEAKER (+)
11 Z9 18BK/DG GROUND
12 M1 18PK FUSED B(+)
13 - -
14 D25 20VT/LB PCI BUS
15 - -
16 - -
17 - -
18 X93 18WT/RD LEFT REAR SPEAKER (+)
19 X91 18WT/BK LEFT REAR SPEAKER (-)
20 X92 18TN/BK RIGHT REAR SPEAKER (-)
21 X94 18TN/VT RIGHT REAR SPEAKER (+)
22 Z9 18BK/DG GROUND
RADIO (PREMIUM) - GRAY 22 WAY
CAV CIRCUIT FUNCTION
1 M1 18PK FUSED B(+)
2 Y105 20BR/RD FUSED IGNITION SWITCH OUTPUT (RUN-ACC)
3 Y166 20OR/DB PANEL LAMPS DRIVER
4- -
5- -
6- -
7 X54 20VT RIGHT FRONT SPEAKER (+)
8 X56 20DB/RD RIGHT FRONT SPEAKER (-)
9 X55 20BR/RD LEFT FRONT SPEAKER (-)
10 X53 20DG LEFT FRONT SPEAKER (+)
11 Z9 18BK/DG GROUND
12 M1 18PK FUSED B(+)
13 X60 20DG/RD RADIO 12V OUTPUT
14 D25 20VT/LB PCI BUS
15 - -
16 - -
17 - -
18 X51 20BR/YL LEFT REAR SPEAKER (+)
19 X57 20BR/LB LEFT REAR SPEAKER (-)
20 X58 20DB/OR RIGHT REAR SPEAKER (-)
21 X52 20DB/WT RIGHT REAR SPEAKER (+)
22 Z9 18BK/DG GROUND
8W - 80 - 94 8W-80 CONNECTOR PIN-OUTSDR

RECIRCULATION DOOR ACTUATOR-2WAY
CAV CIRCUIT FUNCTION
1 C34 20DB/WT COMMON DOOR DRIVER
2 C32 20GY/DB RECIRCULATION DOOR DRIVER
REMOTE RADIO SWITCH-LEFT - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 X20 22GY (EXCEPT ETC) RADIO CONTROL MUX
1 X20 22RD/BK (ETC) RADIO CONTROL MUX
2 Z5 22BK/LB GROUND
REMOTE RADIO SWITCH-RIGHT - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 X20 22GY (EXCEPT ETC) RADIO CONTROL MUX
1 X20 22RD/BK (ETC) RADIO CONTROL MUX
2 Z5 22BK/LB GROUND
SEAT HEATER INTERFACE MODULE - GREEN 14 WAY
CAV CIRCUIT FUNCTION
1 P133 20TN/DG DRIVER SEAT HEATER MUX SWITCH
2 P86 20PK/BK SEAT HEATER DRIVER
3 P142 18TN/DB PASSENGER SEAT TEMPERATURE SENSOR INPUT
4 F235 18RD FUSED B(+)
5 P141 18TN/LB DRIVER SEAT TEMPERATURE SENSOR INPUT
6 F235 18RD FUSED B(+)
7 P144 20BK/LG PASSENGER SEAT TEMPERATURE 5 VOLT SUPPLY
8 P143 20BK/DG DRIVER SEAT TEMPERATURE 5 VOLT SUPPLY
9 P134 20TN/LG PASSENGER SEAT HEATER MUX SWITCH
10 P138 20VT/LG PASSENGER SEAT LOW HEAT LED DRIVER
11 P140 20VT/BK PASSENGER SEAT HIGH HEAT LED DRIVER
12 P137 20VT/DG DRIVER SEAT LOW HEAT LED DRIVER
13 Z121 20BK/LG GROUND
14 P139 20VT/WT DRIVER SEAT HIGH HEAT LED DRIVER
DR8W-80 CONNECTOR PIN-OUTS 8W - 80 - 95

SENTRY KEY IMMOBILIZER MODULE - BLACK 6 WAY
CAV CIRCUIT FUNCTION
1- -
2 D25 20VT/WT PCI BUS
3- -
4 Y135 20LG/BK FUSED IGNITION SWITCH OUTPUT (RUN-START)
5 Z110 20BK/GY GROUND
6 A14 20RD/WT FUSED B(+)
SPEAKER-CENTER INSTRUMENT PANEL - WHITE 2 WAY
CAV CIRCUIT FUNCTION
1 X83 20YL/RD LEFT INSTRUMENT PANEL SPEAKER (-)
2 X84 20OR/BK RIGHT INSTRUMENT PANEL SPEAKER (+)
SPEAKER-LEFT FRONT DOOR - WHITE 3 WAY
CAV CIRCUIT FUNCTION
1 X85 18LG/DG LEFT FRONT DOOR SPEAKER (-)
2- -
3 X87 18LG/RD LEFT FRONT DOOR SPEAKER (+)
SPEAKER-LEFT INSTRUMENT PANEL - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 X81 18YL/BK LEFT INSTRUMENT PANEL SPEAKER (+)
2 X83 18YL/RD LEFT INSTRUMENT PANEL SPEAKER (-)
SPEAKER-LEFT REAR - WHITE 3 WAY
CAV CIRCUIT FUNCTION
1 X93 18WT/RD LEFT REAR SPEAKER (+)
2- -
3 X91 18WT/BK LEFT REAR SPEAKER (-)
8W - 80 - 96 8W-80 CONNECTOR PIN-OUTSDR

SPEAKER-RIGHT FRONT DOOR - WHITE 3 WAY
CAV CIRCUIT FUNCTION
1 X80 18LB/BK RIGHT FRONT DOOR SPEAKER (-)
2- -
3 X82 18LB/VT RIGHT FRONT DOOR SPEAKER (+)
SPEAKER-RIGHT INSTRUMENT PANEL - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 X84 18OR/BK RIGHT INSTRUMENT PANEL SPEAKER (+)
2 X86 18OR/RD RIGHT INSTRUMENT PANEL SPEAKER (-)
SPEAKER-RIGHT REAR - WHITE 3 WAY
CAV CIRCUIT FUNCTION
1 X94 18TN/VT RIGHT REAR SPEAKER (+)
2- -
3 X92 18TN/BK RIGHT REAR SPEAKER (-)
SPEED CONTROL SERVO - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 V36 20TN/RD SPEED CONTROL VACUUM SOLENOID CONTROL
1 V36 20TN/RD (NGC) S/C VACUUM CONTROL
2 V35 20LG/RD (NGC) S/C VENT CONTROL
2 V35 20LG/RD SPEED CONTROL VENT SOLENOID CONTROL
3 V30 20DB/RD SPEED CONTROL BRAKE SWITCH OUTPUT
3 V30 20DB/RD (NGC) S/C BRAKE SWITCH OUTPUT
4 Z10 20BK/TN GROUND
DR8W-80 CONNECTOR PIN-OUTS 8W - 80 - 97

SPEED CONTROL SWITCH-LEFT (ETC) - WHITE 3 WAY
CAV CIRCUIT FUNCTION
1 V38 20VT/OR S/C SWITCH NO.2 SIGNAL
2 Y215 20BK/LB S/C SWITCH RETURN
3 V37 20RD/LG S/C SWITCH NO.1 SIGNAL
SPEED CONTROL SWITCH-LEFT (EXCEPT ETC) - GREEN 2 WAY
CAV CIRCUIT FUNCTION
A V37 20RD/LG S/C SWITCH NO.1 SIGNAL
B K4 20BK/LB SENSOR GROUND
SPEED CONTROL SWITCH-RIGHT (ETC) - WHITE 3 WAY
CAV CIRCUIT FUNCTION
1 V38 20VT/OR S/C SWITCH NO.2 SIGNAL
2 Y215 20BK/LB S/C SWITCH RETURN
3 V37 20RD/LG S/C SWITCH NO.1 SIGNAL
SPEED CONTROL SWITCH-RIGHT (EXCEPT ETC) - GREEN 2 WAY
CAV CIRCUIT FUNCTION
A V37 20RD/LG S/C SWITCH NO.1 SIGNAL
B K4 20BK/LB SENSOR GROUND
SWITCH-DRIVER SEAT BELT - DK GRAY 2 WAY
CAV CIRCUIT FUNCTION
1 Z237 20BK/OR GROUND
2 G10 20LG/RD SEAT BELT SWITCH SENSE
8W - 80 - 98 8W-80 CONNECTOR PIN-OUTSDR

SWITCH-PASSENGER AIRBAG ON-OFF - BLUE 6 WAY
CAV CIRCUIT FUNCTION
1 R5 18VT/YL PASSENGER AIRBAG MUX SWITCH SENSE
2 R4 18BR/YL PASSENGER AIRBAG MUX SWITCH RETURN
3 R166 18LG/TN PASSENGER AIRBAG INDICATOR DRIVER
4 F14 18LG/YL FUSED IGNITION SWITCH OUTPUT (RUN-START)
5- -
6- -
TAIL/STOP/TURN SIGNAL LAMP-LEFT - BLACK 6 WAY
CAV CIRCUIT FUNCTION
1 Y174 18PK/VT FUSED PARK LAMP RELAY OUTPUT
2- -
3 Z150 18BK GROUND
4 L24 18WT/LG LEFT STOP LAMP FEED
5 L63 18DG/RD LEFT REAR TURN LAMP DRIVER
6 L1 18VT/BK BACK-UP LAMP FEED
TAIL/STOP/TURN SIGNAL LAMP-RIGHT - BLACK 6 WAY
CAV CIRCUIT FUNCTION
1 L7 18PK/VT HEADLAMP SWITCH OUTPUT
2- -
3 Z151 18BK GROUND
4 L22 18WT/LG RIGHT STOP LAMP FEED
5 L62 18DG/RD RIGHT REAR TURN LAMP DRIVER
6 L1 18VT/BK BACK-UP LAMP FEED
TENSION REDUCER-SEAT BELT (STANDARD CAB)-2WAY
CAV CIRCUIT FUNCTION
1 Y105 20BR/RD FUSED IGNITION SWITCH OUTPUT (RUN-ACC)
2 G10 20LG/RD SEAT BELT SWITCH SENSE
DR8W-80 CONNECTOR PIN-OUTS 8W - 80 - 99

TENSIONER-LEFT SEAT BELT - YELLOW 2 WAY
CAV CIRCUIT FUNCTION
1 R54 18LB/YL LEFT SEAT BELT TENSIONER LINE 2
2 R56 18LB/DG LEFT SEAT BELT TENSIONER LINE 1
TENSIONER-RIGHT SEAT BELT - YELLOW 2 WAY
CAV CIRCUIT FUNCTION
1 R53 18LG/YL RIGHT SEAT BELT TENSIONER LINE 2
2 R55 18LG/DG RIGHT SEAT BELT TENSIONER LINE 1
THROTTLE POSITION SENSOR - NATURAL 3 WAY
CAV CIRCUIT FUNCTION
1 K7 18OR 5 VOLT SUPPLY
2 K22 18OR/DB (4.7L/5.9L) TP NO.1 SIGNAL
2 K4 18BK/LB (3.7L) SENSOR GROUND
3 K4 18BK/LB (4.7L/5.9L) SENSOR GROUND
3 K22 18OR/DB (3.7L) TP NO.1 SIGNAL
THROTTLE POSITION SENSOR (DIESEL)-6WAY
CAV CIRCUIT FUNCTION
1 K104 18RD/WT SENSOR GROUND
2 K101 18WT THROTTLE POSITION SENSOR RETURN
3 K232 18YL THROTTLE POSITION SIGNAL
4 K56 18LG/OR SUPPLY VOLTAGE
5 K900 18DB/DG SENSOR GROUND
6 K49 18VT/BK No Function Defined
8W - 80 - 100 8W-80 CONNECTOR PIN-OUTSDR

TRAILER TOW CONNECTOR-4WAY
CAV CIRCUIT FUNCTION
1 Z52 14BK GROUND
2 L76 18BK/OR PARK LAMP RELAY OUTPUT
3 Y141 18YL/PK TRAILER TOW LEFT TURN RELAY OUTPUT
4 Y140 18WT/PK TRAILER TOW RIGHT TURN RELAY OUTPUT
TRAILER TOW CONNECTOR-ADD ON - 10 WAY
CAV CIRCUIT FUNCTION
1- -
2 Y140 18WT/PK TRAILER TOW RIGHT TURN RELAY OUTPUT
3 L1 18VT/BK BACKUP LAMP FEED
4 Y133 14WT/RD FUSED B(+)
5 L76 18BK/OR PARK LAMP RELAY OUTPUT
6- -
7 B40 14LB TRAILER TOW BRAKE B(+)
8 Z52 14BK GROUND
9 Z52 14BK GROUND
10 Y141 18YL/PK TRAILER TOW LEFT TURN RELAY OUTPUT
TRANSFER CASE CONTROL MODULE C1 - BLACK 16 WAY
CAV CIRCUIT FUNCTION
A1 D25 20VT/DB PCI BUS
A2 - -
A3 - -
A4 Y122 20DG/BR 4WD LOW INDICATOR
A5 Y123 20DG/OR 4WD HIGH INDICATOR
A6 Y120 20YL/DG MODE SELECT
A7 Y116 20YL/GY MODE SENSOR GROUND
A8 Z366 18BK/RD GROUND
B1 - -
B2 - -
B3 - -
B4 Y121 20YL/LG NEUTRAL INDICATOR
B5 Y187 20RD 2WD/AWD INDICATOR
B6 Y112 20YL/BR MODE SENSOR D
B7 - -
B8 Z114 20LG/BK SENSOR GROUND
DR8W-80 CONNECTOR PIN-OUTS 8W - 80 - 101

TRANSFER CASE CONTROL MODULE C2 - GRAY 16 WAY
CAV CIRCUIT FUNCTION
A1 Y114 20YL/VT MODE SENSOR B
A2 Y113 20YL/OR MODE SENSOR A
A3 - -
A4 - -
A5 - -
A6 T24 20BR/YL PARK/NEUTRAL POSITION SWITCH SENSE (T41)
A7 - -
A8 Y117 20YL/DB 5 VOLT MODE SENSOR SUPPLY
B1 - -
B2 Y115 20YL/WT MODE SENSOR C
B3 - -
B4 - -
B5 - -
B6 - -
B7 - -
B8 Y118 20YL/LB 5 VOLT SELECTOR SWITCH SUPPLY
TRANSFER CASE CONTROL MODULE C3-4WAY
CAV CIRCUIT FUNCTION
A Z21 16BK/LG GROUND
B A34 16LB/RD FUSED B(+)
C Y124 16DG/VT SHIFT MOTOR CONTROL A
D Y125 16DG/WT SHIFT MOTOR CONTROL B
TRANSFER CASE MODE SENSOR-6WAY
CAV CIRCUIT FUNCTION
1 Y112 20YL/BR MODE SENSOR D
2 Y117 20YL/DB 5 VOLT MODE SENSOR SUPPLY
3 Y114 20YL/VT MODE SENSOR B
4 Y116 20YL/GY MODE SENSOR GROUND
5 Y113 20YL/OR MODE SENSOR A
6 Y115 20 YL/WT MODE SENSOR C
8W - 80 - 102 8W-80 CONNECTOR PIN-OUTSDR

TRANSFER CASE POSITION SENSOR (4.7L/5.9L) - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 K77 18BR/WT TRANSFER CASE POSITION SENSOR INPUT
2 K4 18BK/LB SENSOR GROUND
TRANSFER CASE SELECTOR SWITCH - 12 WAY
CAV CIRCUIT FUNCTION
1 Y118 20YL/LB 5 VOLT SELECTOR SWITCH SUPPLY
2 Y187 20RD 2WD/AWD INDICATOR
3- -
4 Y121 20YL/LG NEUTRAL INDICATOR
5 Y120 20YL/DG MODE SELECT
6 Y189 20OR/BK PANEL LAMPS FEED
7 Y107 20VT/RD FUSED IGNITION SWITCH OUTPUT (RUN)
8 Y122 20DG/BR 4WD LOW INDICATOR
9 Y123 20DG/OR 4WD HIGH INDICATOR
10 - -
11 Z358 20BK/YL MODE SELECTOR SWITCH GROUND
12 - -
TRANSFER CASE SHIFT MOTOR-2WAY
CAV CIRCUIT FUNCTION
1 Y125 16DG/WT SHIFT MOTOR CONTROL B
2 Y124 16DG/VT SHIFT MOTOR CONTROL A
DR8W-80 CONNECTOR PIN-OUTS 8W - 80 - 103