Mercedes-Benz S-class W140 (1991-1998) nca Wiring diagrams

1995 VFTC 1995-98 28/3 ACC PUSHBUTTON CONTROL UNIT ACTIVE CHARCOAL FILTER SWITCH BLK WIRE BLK/BLU WIRE BLK/GRY/BLU WIRE BLK/PNK WIRE BLK/RED WIRE BLK/YEL/GRN WIRE BLK/YEL/WHT WIRE BLOWER MOTOR BLOWER REGULATOR BLU/BLK WIRE BLU/GRN WIRE BLU/GRN/WHT WIRE BLU/GRY WIRE BLU/RED WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/RED WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CHARCOAL FILTER ACTUATOR CIRCULATION PUMP COOLANT TEMPERATURE SENSOR LEFT HEATER CORE TEMPERATURE SENSOR DIAGNOSTIC CONNECTOR (RIGHT REAR OF ENGINE COMPARTMENT) EVAPORATOR TEMPERATURE SENSOR EXCEPT 1995-96 FUSE BOX FUSE 20 GRN/BLK WIRE GRN/BLU WIRE GRN/RED WIRE GRY WIRE GRY/BLK WIRE GRY/BLK/YEL WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/RED WIRE GRY/YEL WIRE GRY/YEL/VIO WIRE HEATER SUPPLY UNIT HEATING SYSTEMS RECIRCULATION UNIT HOT IN RUN OR START IN-CAR TEMPERATURE SENSOR LEFT DUOVALVE RIGHT DUOVALVE MALFUNCTION INDICATION TERMINAL BLOCK NCA WIRE OUTSIDE TEMPERATURE SENSOR PNEUMATIC CONTROL UNIT RED WIRE RED/ GRY WIRE RED/GRN WIRE REFRIGERANT PRESSURE SENSOR RIGHT HEATER CORE TEMPERATURE SENSOR TERMINAL BLOCK (BATTERY POWER) WARM/ COOL AIR SWITCH WHT/BLK WIRE WHT/RED WIRE YEL WIRE YEL/GRY WIRE

1995 VFTC 1995-98 22/1 28/1 A/C COMPRESSOR AUXILIARY COOLANT PUMP CONTROL RELAY (IN FUSE/RELAY BOX) AUXILIARY FAN PRERESISTOR AUXILIARY FAN RELAY, STAGE 1, 2 (IN FUSE/RELAY BOX) BASE MODULE (IN MODULE BOX IN RIGHT REAR OF ENGINE COMPARTMENT) BLK/GRY/BLU WIRE BLK/RED/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/RED WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/WHT WIRE COMPRES- SOR CLUTCH DIESEL DIODE MATRIX (RIGHT FOOTWELL) ELECTRONIC ACCELERATOR/ CRUISE CONTROL/ IDLE SPEED CONTROL UNIT EXCEPT 1995-98 FUSE 18 FUSE 2 FUSE 21 FUSE BOX GASOLINE GRN/RED WIRE GRY WIRE GRY/BLU WIRE GRY/RED WIRE HOT AT ALL TIMES HOT IN RUN LEFT AUXILIARY FAN MAXI FUSE BOX NCA WIRE RED/GRN WIRE RIGHT AUXILIARY FAN RPM SENSOR SWITCHOVER VALVE UNIT VIO/WHT WIRE WHT/BLU WIRE

87 ABS ABS ABS ASR WARNING IND. WARNING IND. SPEEDOMETER ASR ASR FUNCTION IND. ASR LATERAL ACCELERATION SENSOR ASR OFF SWITCH RIGHT REAR AXLE VSS ASR/SPS CONTROL UNIT BASE MODULE (RIGHT REAR OF ENGINE COMPARTMENT, IN MODULE BOX) BLK WIRE BLK/PNK WIRE BLK/PNK/WHT WIRE BLK/RED WIRE BLK/RED/WHT WIRE BLK/WHT WIRE BLK/YEL/RED WIRE BLS BLU WIRE BLU/WHT WIRE BRAKE WARNING IND BRN WIRE BRN/BLK (OR BLU/WHT) WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/GRN WIRE BRS OEF HAS COMPUTER DATA LINES SYSTEM DF HR MDF HR DF HL MDF HL DFA VR DFAVL EXTERIOR LAMP FAILURE MONITORING UNIT FUSE 23 FUSE BOX (LEFT REAR OF ENGINE COMPARTMENT) GRN WIRE GRY WIRE GRY/RED WIRE HAS HOT IN RUN OR START INSTRUMENT CLUSTER LEFT FRONT AXLE VSS (BEHIND CLUSTER) SENSOR LEFT REAR WHEEL SPEED NCA WIRE PARK BRAKE SWITCH (AT PARK BRAKE RELEASE) PNK WIRE RED WIRE RED/BLU WIRE RED/YEL WIRE RHEOSTAT RIGHT FRONT AXLE VSS SENSOR STOP LIGHT SWITCH (TOP OF BRAKE PEDAL SUPPORT) TERMINAL BLOCK (RIGHT REAR OF ENGINE COMPARTMENT) TEST CONNECTION FOR DIAGNOSIS WHT WIRE YEL WIRE YEL/BLU WIRE

2 3 AHL EHL 7 8 UR ABS/ASR HYDRAULIC UNIT AHR AHR ASR/SPS CONTROL UNIT (RIGHT REAR OF ENGINE COMPARTMENT, IN MODULE BOX) ASV EVL USV AVL BLK WIRE COPPER BRAID DF VL DF VR (+) EVR VR(A) GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLU WIRE GRY/GRN WIRE HOT AT ALL TIMES MASTER BRAKE CYLINDER SWITCHOVER VALVE NCA WIRE RED WIRE SPS P-VALVE TERMINAL BLOCK UMRFP VR 35 36 37 38 VRA MR-A WHT WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/GRY WIRE YEL/PNK WIRE YEL/RED WIRE YEL/VIO WIRE YEL/WHT WIRE

ABS ABS ASR WARNING IND. WARNING IND. SPEEDOMETER ASR ASR DFA HL ASR FUNCTION IND. ASR OFF SWITCH BASE MODULE (RIGHT REAR OF ENGINE COMPARTMENT, IN MODULE BOX) BLK WIRE BLK/GRN/VIO WIRE BLK/RED/WHT WIRE BLK/WHT WIRE BLK/YEL/RED WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE CC CONTROL MODULE DF HR 87 ABS BLS DF HR MDF HR DF HL MDF HL DFAVL DFA VR ENGINE CONTROL MODULE (RIGHT REAR OF ENGINE COMPT) ETS OFF ETS/SPS CONTROL UNIT (RIGHT REAR OF ENGINE COMPARTMENT, IN MODULE BOX) EXTERIOR LAMP FAILURE MONITORING UNIT FUSE 23 FUSE BOX (LEFT REAR OF ENGINE COMPARTMENT) GRN WIRE GRY WIRE GRY/RED WIRE HOT AT ALL TIMES HOT IN RUN OR START INSTRUMENT CLUSTER LEFT FRONT AXLE VSS (BEHIND CLUSTER) SENSOR LEFT REAR WHEEL SPEED NCA WIRE PNK WIRE RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RHEOSTAT RIGHT FRONT AXLE VSS RIGHT REAR AXLE VSS SENSOR STOP LIGHT SWITCH (TOP OF BRAKE PEDAL SUPPORT) TERMINAL BLOCK TEST CONNECTION FOR DIAGNOSIS VIO/BLU WIRE WHT WIRE YEL WIRE YEL/RED WIRE

2 3 AHL EHL 7 8 UR ABS/ASR HYDRAULIC UNIT AHR AHR ASV VRA MR-A AVL BLK WIRE COPPER BRAID DF VL DF VR (+) ETS/SPS CONTROL UNIT (RIGHT REAR OF ENGINE COMPARTMENT, IN MODULE BOX) EVL EVR VR(A) GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLU WIRE HOT AT ALL TIMES NCA WIRE RED WIRE SPS P-VALVE TERMINAL BLOCK UMRFP USV VR 35 36 37 38 WHT WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/GRY WIRE YEL/PNK WIRE YEL/RED WIRE YEL/VIO WIRE YEL/WHT WIRE

1 2 3 6 15 16 18 19 SN 1 15 SN 2 2 3 4 5 6 TK DF HD SN 2 TK SN 1 32/2 ALARM HORN ATA CONTROL MODULE (RIGHT SIDE OF TRUNK) BLK WIRE BLK/RED WIRE BLK/YEL/RED WIRE BLU WIRE BLU/BLK WIRE BLU/GRY WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/PNK WIRE BRN/RED WIRE BRN/YEL WIRE CENTRAL LOCKING INSIDE SWITCH CONVENIENCE CONTROL MODULE (RIGHT SIDE OF TRUNK) DIAGNOSTIC CONNECTOR ENGINE HOOD SWITCH FUSE 11 FUSE 15 FUSE 2 FUSE 23 FUSE BOX GRN WIRE GRY WIRE GRY/WHT WIRE HEADLIGHTS SYSTEM (FUSE 12) HEADLIGHTS SYSTEM (FUSE 8) HEADLIGHTS SYSTEM (FUSE 9) HOT AT ALL TIMES HOT IN RUN OR START INFRARED REMOTE CONTROL MODULE LEFT FRONT DOOR ACTUATOR LEFT FRONT DOOR LOCK SWITCH LEFT FRONT DOOR SWITCH LEFT REAR DOOR SWITCH RIGHT REAR DOOR SWITCH LOCK CATCH/ TRUNK LID MICRO- SWITCH NCA WIRE PSE CONTROL MODULE (RIGHT SIDE OF REAR SEAT) RADIO CONTROL MODULE REAR FUSE BOX RED WIRE RED/GRY WIRE RIGHT FRONT DOOR LOCK SWITCH RIGHT FRONT DOOR SWITCH RIGHT TRUNK LAMP SEDAN, COUPE SN 1 SN 2 SN 2 DF HD TK STOP LAMP SWITCH TERMINAL TERMINAL BLOCK TK TK DF HD TRUNK LID LOCK SWITCH WHT WIRE WHT/GRN WIRE WHT/PNK WIRE YEL WIRE

ABS CONTROL MODULE AUS TNA 87 UG 87 UG 31 31 BASE MODULE (IN MODULE BOX, ON RIGHT REAR OF ENGINE COMPT) BLK WIRE BLK/GRN WIRE BLK/GRN/PPL WIRE BLK/YEL/RED WIRE BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/RED WIRE BLU/YEL WIRE BRN WIRE BRN/WHT WIRE CAN-L CAN-H COMPUTER DATA LINES SYSTEM CRUISE CONTROL SWITCH CRUISE CONTROL/IDLE SPEED CONTROL ACTUATOR DF VL 87 KP DFA HA DFA VL FUSE BOX FUSE 23 GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/RED WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/RED WIRE GRY/YEL WIRE HOT IN RUN OR START I/P INSTRUMENT CLUSTER IPW IPS IP- KSK LLK LSK NCA WIRE PNK WIRE PPL PPL 2 RED WIRE RED/GRN WIRE RED/GRN/WHT WIRE RED/WHT WIRE RED/YEL WIRE S-B S+B DF H SSA STARTER LOCK-OUT/ BACKUP LAMP SWITCH ULSK WHT WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/GRN WIRE YEL/GRN/BLK WIRE

1995 VFTC BLK/BRN/VIO WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/VIO WIRE BRN/YEL WIRE CAN A CAN B CENTER CONSOLE COOLANT CIRCULATION PUMP FRONT A/C CIRCUIT FTX FUSE 1 GRY WIRE GRY/BLU WIRE GRY/GRN/VIO WIRE GRY/RED WIRE GRY/RED/VIO WIRE GRY/YEL/VIO WIRE HOT IN RUN OR START LEFT DUOVALVE LEFT REAR HEATER CORE TEMPERATURE SENSOR (IN REAR OF CENTER CONSOLE) NCA WIRE REAR A/C ELECTRONIC BLOWER REGULATOR, REAR A/C PUSHBUTTON CONTROL MODULE REAR AUXILIARY HEATER SUPPLY UNIT REAR BLOWER MOTOR (BELOW CENTER CONSOLE) REAR EVAPORATOR TEMPERATURE SENSOR (IN REAR OF CENTER CONSOLE) REAR FUSE BOX (IN LUGGAGE COMPARTMENT, BEHIND RIGHT TRIM PANEL) REAR REFRIGERANT SHUT-OFF VALVE REAR TUNNEL FLAP VACUUM VALVE RED WIRE RIGHT DUOVALVE RIGHT REAR HEATER CORE TEMPERATURE SENSOR (IN REAR OF CENTER CONSOLE) WHT/PNK/VIO WIRE

1995-96 2 3 W/ ELECTRONIC ACCELERATOR W/O ELECTRONIC ACCELERATOR A/C PUSHBUTTON CONTROL MODULE ADS CONTROL MODULE (IN MODULE BOX, ON RIGHT REAR OF ENGINE COMPT) ATA CONTROL MODULE (ON RIGHT SIDE OF LUGGAGE COMPT) BASE MODULE (IN MODULE BOX, ON RIGHT REAR OF ENGINE COMPT) BLK/BLU WIRE BLK/YEL WIRE BLU/GRY WIRE BRN WIRE CAN 3 8 1 CAN H+ CAN 3 19 CAN L CAN L- 3 18 CAN-H CONVENIENCE FEATURE CONTROL MODULE (ON RIGHT SIDE OF LUGGAGE COMPT) DIAGNOGSTIC MODULE (OBD II) ENGINE CONTROL MODULE (HFM-SFI) FUSE 15 FUSE 17 FUSE BOX GRN WIRE GRN/BLK WIRE GRN/BRN WIRE GRN/PPL WIRE GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START INFRARED REMOTE CONTROL MODULE (ON RIGHT SIDE OF LUGGAGE COMPT) INSTRUMENT CLUSTER NCA WIRE PNK WIRE PSE CONTROL MODULE (RIGHT SIDE OF REAR SEAT) RED WIRE RED/WHT WIRE SEE SYSTEM DIAGRAM FOR PIN NUMBER SPS CONTROL MODULE SRS CONTROL MODULE SRS IND TEST CONNECTOR FOR DIAGNOSIS (RIGHT REAR CORNER OF ENGINE COMPARTMENT) TRANSMISSION CONTROL MODULE W/ ASR W/O ASR WHT WIRE WHT/GRN WIRE YEL WIRE YEL/RED (OR YEL/BLU) WIRE YEL/RED WIRE