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

1995-96 20/2 AH EH BLK WIRE BLK/YEL WIRE BLU WIRE BRN WIRE COMBINATION RELAY (IN FUSE BOX) COUPE, SEDAN FUSE 15 FUSE 34 FUSE 6 FUSE BOX GRN WIRE GRY/BLU WIRE HEATED REAR WINDOW SWITCH HOT AT ALL TIMES HOT IN ACC OR RUN HOT IN RUN OR START INTERIOR LIGHTS SYSTEM (RHEOSTAT) MAXI FUSE BOX NCA WIRE ON OFF REAR FUSE BOX FUSE 17 REAR WINDOW DEFOGGER RELAY MODULE REAR WINDOW DEFROST ELEMENT RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE SEDAN, COUPE WHT WIRE YEL WIRE

ANTI-LOCK BRAKES SYSTEM ASR/SPS CONTROL MODULE BASE MODULE (IN MODULE BOX, ON RIGHT REAR OF ENGINE COMPT) BLK WIRE BLK/GRN WIRE BLK/GRN/PPL WIRE BLK/RED/WHT WIRE BLK/RED/YEL 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 CLOSED THROTTLE POSITION SWITCH COMPUTER DATA LINES SYSTEM CRUISE CONTROL SWITCH DIAGNOSTIC CONNECTOR (RIGHT REAR CORNER OF ENGINE COMPT) ELECTRONIC ACCELERATOR/CRUISE CONTROL/IDLE SPEED CONTROL ACTUATOR FUSE BOX FUSE 23 GRN WIRE GRN/BLU WIRE GRN/RED WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/RED WIRE HOT IN RUN OR START INSTRUMENT CLUSTER KSK GETR UGETR LSK MSK NCA WIRE PKS S-B S+B PNK WIRE PPL RED WIRE RED/BLU WIRE RED/GRN WIRE RED/GRN/WHT WIRE RED/WHT WIRE RED/YEL WIRE SPEED- OMETER SPS IPS P- STARTER LOCK-OUT/ BACKUP LAMP SWITCH STOP LAMP SWITCH UPKS USK W/ ADS W/O ADS WHT WIRE WHT/BLK WIRE WHT/GRN WIRE YEL WIRE YEL/BLK/GRN WIRE YEL/GRN WIRE

ABS CONTROL UNIT ABS/ASR CONTROL UNIT BASE MODULE BLK WIRE BLK/GRN/RED WIRE BLK/YEL WIRE BLK/YEL/RED WIRE BLU WIRE BLU/GRN (OR BLK/GRN/VIO) WIRE BLU/GRN WIRE BLU/YEL WIRE BRN WIRE BRN/GRN WIRE DATA LINK CONNECTOR (TOP OF MODULE BOX) GRN WIRE NCA WIRE RED WIRE SPEED SENSITIVE POWER STEERING CONTROL UNIT SPEED SENSITIVE POWER STEERING P-VALVE VIO WIRE W/ TRACTION CONTROL W/O TRACTION CONTROL YEL WIRE

ABS/ASR CONTROL MODULE ADS CONTROL MODULE (IN MODULE BOX, RIGHT REAR OF ENGINE COMPT) ADS WARNING IND. BASE MODULE (RIGHT REAR SIDE OF ENGINE COMPARTMENT, IN MODULE BOX) BLK WIRE BLK/GRN WIRE BLK/GRN/RED WIRE BLK/RED/WHT WIRE BLK/RED/YEL WIRE BLK/YEL WIRE BLS LAM ZAS BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/BLU/WHT WIRE BRN/GRY WIRE BRN/YEL WIRE COMFORT/SPORT SWITCH DATA LINK CONNECTOR (RIGHT REAR OF ENGINE COMPARTMENT) FUSE 17 FUSE BOX GRN WIRE GRN/RED WIRE GRN/VIO WIRE GRY WIRE GRY/YEL WIRE HAR HOT AT ALL TIMES HOT IN RUN OR START INSTRUMENT CLUSTER LEFT FRONT AXLE DAMPER LEFT FRONT BODY LATERAL ACCELERATION SENSOR LEFT REAR AXLE DAMPER LW DF NCA WIRE PNK WIRE RED WIRE RIGHT FRONT AXLE DAMPER RIGHT FRONT BODY LATERAL ACCELERATION SENSOR RIGHT REAR BODY LATERAL ACCELERATION SENSOR RIGHT REAR AXLE DAMPER STEERING ANGLE SENSOR STOP LAMP SWITCH VALVE UNIT VVR+ WHT WIRE WHT/GRN WIRE WHT/YEL WIRE YEL WIRE YEL/BLK WIRE ZA+ VVL ZA+ ZA- HAL ZA- ZAS ZR+ ZR- ZRS 31

22/2 36/2 37/2 5.1 BACK-UP LAMPS CIRCUIT BACKUP BLK WIRE BLK/GRN WIRE BLK/RED WIRE BLK/RED/GRN WIRE BLK/RED/VIO WIRE BLK/RED/WHT WIRE BLK/WHT WIRE BLK/YEL/GRN WIRE BLU/WHT WIRE BRN WIRE BRN/GRY WIRE CENTER HIGH MOUNTED STOP LAMP TURN SIGNAL/ SIDE MARKER LAMP COMBINATION RELAY (IN FUSE BOX) COMBINATION SWITCH EXT LAMP FAILURE IND EXTERIOR LAMP FAILURE MONITORING UNIT (LEFT REAR OF ENGINE COMPT) EXTERIOR LAMP SWITCH FUSE 17 FUSE 23 FUSE 24 FUSE 25 FUSE 9 FUSE BOX FUSE BOX FUSE 8 GRN WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/GRN/WHT WIRE GRY/RED WIRE GRY/RED/YEL WIRE GRY/VIO WIRE GRY/VIO/WHT WIRE GRY/WHT/VIO WIRE GRY/YEL WIRE GRY/YEL/WHT WIRE HAZARD FLASHER SWITCH HEAD LH HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM WIPER/ WASHER SYSTEM HOT AT ALL TIMES HOT IN OFF, ACCY HOT IN RUN OR START INSTR CLUST SYSTEM INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM LEFT HEADLAMP UNIT LEFT LICENSE PLATE LAMP LEFT TURN IND LH HEAD HEAD MARKER MARKER FOG NCA WIRE OFF PARK OFF PARK RH OFF RH PARK RED WIRE RIGHT HEADLAMP UNIT RIGHT LICENSE PLATE LAMP RIGHT TAILLAMP UNIT RIGHT TURN IND STOP STOP LAMP SWITCH TAIL/ PARK TERMINAL TERMINAL BLOCK TURN TURN LEFT TAILLAMP UNIT TURN SIGNAL SWITCH TURN SIGNAL/ SIDE MARKER LAMP VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

12/1 12/2 14/2 14/3 14/1 20/2 5.1 BLK WIRE BRN WIRE COMBINATION SWITCH COUPE EXTERIOR LAMP FAILURE MONITORING UNIT (LEFT REAR OF ENGINE COMPARTMENT) EXTERIOR LAMP SWITCH FOG LAMP HIGH LOW FOG LAMP SWITCH FUSE 12 FUSE 11 FUSE 13 FUSE 14 FUSE 15 FUSE 26 FUSE 8 FUSE 9 FUSE 10 FUSE BOX GRN WIRE GRN/WHT WIRE GRY WIRE HEAD HEAD- LAMP FOG LAMP HI FLASH HI FLASH LO HIGH BEAM INDICATOR HIGH LOW HOT AT ALL TIMES HOT IN ACCY, RUN, OR START INSTRUMENT CLUSTER LEFT FOGLAMP LEFT HEADLAMP UNIT HEAD- LAMP LEFT HEADLAMP UNIT LOW NCA WIRE NSE OFF PARK OFF PARK HEAD OFF RH PARK LH HEAD RED WIRE RH LH RIGHT FOGLAMP RIGHT HEADLAMP UNIT RIGHT HEADLAMP UNIT SEDAN WHT WIRE YEL WIRE

37/2 BLK WIRE BLK/VIO WIRE BLK/YEL/PNK WIRE BRN WIRE COUPE FANFARE HORN FANFARE HORN SWITCH FANFARE HORNS RELAY MODULE HORN/ AIRBAG CLOCKSPRING CONTACT HOT IN RUN OR START FUSE BOX FUSE 25 NCA WIRE YEL WIRE

A/C PUSHBUTTON CONTROL MODULE AIR DISTRIBUTION SWITCH BLU WIRE BRN WIRE CENTER AIR OUTLET CONTROLS CENTER CONSOLE COMBINATION RELAY COMFORT, SPORT SWITCH DOME LAMP W/ SHUT- OFF, READING LAMP EXTERIOR LAMP SWITCH FRONT CIGAR LIGHTER W/ ASHTRAY ILLUMINATION FUSE BOX FUSE 9 GLOVE COMPARTMENT LOCK GRY WIRE GRY/BLU WIRE GRY/RED WIRE GRY/VIO WIRE HAZARD FLASHER SWITCH HEAD HOT AT ALL TIMES HOT IN OFF, ACCY INSTRUMENT CLUSTER LEFT REAR CIGAR LIGHTER (SEDAN) LH HEAD NCA WIRE OFF PARK RH OFF RH OUTSIDE REARVIEW MIRROR SWITCH PARK RADIO REAR A/C PUSHBUTTON CONTROL MODULE REAR AIR OUTLET REAR CIGAR LIGHTER (COUPE) REAR HEAD RESTRAINT SWITCH REAR WINDOW DEFROSTER SWITCH RHEOSTAT RIGHT REAR CIGAR LIGHTER (SEDAN) SEAT BELT EXTENDER SWITCH ASR OFF SWITCH SLIDING/ POP-UP ROOF SWITCH TERMINAL TRANSMISSION SELECTOR LEVER VIO WIRE WARNING MODULE

BLK/GRY WIRE BLK/GRY/RED WIRE BLU/WHT WIRE BRN WIRE COMBINATION RELAY FUSE AND RELAY BOX FUSE 12 HOT IN ACC, RUN OR START LEFT FRONT SEAT BELT BUCKLE/ COMFORT FEATURE SWITCH LEFT FRONT SEAT BELT COMFORT FEATURE SOLENOID LEFT REAR SEAT BELT BUCKLE/ COMFORT FEATURE SWITCH LEFT REAR SEAT BELT COMFORT FEATURE SOLENOID NCA WIRE RED WIRE RIGHT FRONT SEAT BELT BUCKLE/ COMFORT FEATURE SWITCH RIGHT FRONT SEAT BELT COMFORT FEATURE SOLENOID RIGHT REAR SEAT BELT BUCKLE/ COMFORT FEATURE SWITCH RIGHT REAR SEAT BELT COMFORT FEATURE SOLENOID

ADJUSTABLE CAMSHAFT TIMING SOLENOID AIR PUMP AIR PUMP SWITCH- OVER VALVE AIR RELAY MODULE BLK WIRE BLK/RED WIRE BLK/RED/YEL WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/BLU WIRE BRN/GRY WIRE BRN/WHT WIRE BRN/YEL WIRE CAMSHAFT POSITION SENSOR COMPUTER DATA LINES CRANKSHAFT POSITION SENSOR EGR SWITCHOVER VALVE ENGINE CONTROL MODULE (HFM-SFI) ENGINE COOLANT TEMPERATURE SENSOR INTAKE AIR TEMPERATURE SENSOR FUSE BOX FUSE 6 GRN WIRE GRN/RED WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/VIO WIRE GRY/WHT WIRE GRY/YEL WIRE HOT AT ALL TIMES HOT FILM MASS AIR FLOW SENSOR HOT IN RUN OR START IGNITION COIL 1 IGNITION COIL 2 IGNITION COIL 3 INJ 3 INJ. #4 INJ. #2 INJ. #5 INJ. #1 INJ. #6 KNOCK SENSOR 1 (RIGHT SIDE OF ENGINE) KNOCK SENSOR 2 (LEFT SIDE OF ENGINE) NCA WIRE PNK WIRE PNK/RED WIRE RED WIRE RED/GRN WIRE RESONANCE INTAKE MANIFOLD SWITCHOVER VALVE SOLID STATE SPARK PLUG #1 SPARK PLUG #6 SPARK PLUG #2 SPARK PLUG #5 SPARK PLUG #3 SPARK PLUG #4 TERMINAL BLOCK VIO WIRE WHT WIRE WHT/BLU WIRE YEL WIRE YEL/RED WIRE YEL/WHT WIRE