Mercedes-Benz S-class W140 (1991-1998) blk/yel Wiring diagrams

32/1 32/2 37/1 A/C SYSTEM ANTI-THEFT ALARM CONTROL UNIT (RIGHT SIDE OF TRUNK) BLK WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/GRY WIRE BRN/GRY/YEL WIRE BRN/PNK WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CENTER CONSOLE CF CONTROL UNIT (RIGHT SIDE OF TRUNK) CL TRUNK LID SWITCH FUSE 11 FUSE 25 FUSE 3 FUSE BOX GRN WIRE GRN/BLK WIRE GRY WIRE GRY/BLU WIRE GRY/YEL WIRE HOT AT ALL TIMES HOT IN RUN OR START IGNITION/ STARTER SWITCH INTERIOR CL SWITCH LEFT FRONT DOOR LOCK SWITCH LEFT REAR DOOR SWITCH NCA WIRE OFF PSE CONTROL MODULE REAR FUSE BOX RED WIRE RED/GRN WIRE RHR RELEASE SWITCH RIGHT FRONT DOOR LOCK SWITCH RIGHT FRONT DOOR SWITCH RIGHT REAR DOOR SWITCH ROTARY TUMBLER/ TRUNK LID MICROSWITCH RUN WIRE STARTER LOCK-OUT/ BACKUP LAMP SWITCH TERMINAL TERMINAL BLOCK TEST CONNECTION FOR DIAGNOSIS (RIGHT SIDE OF ENGINE COMPT) TRUNK LID LOCK SWITCH TRUNK LID REMOTE CONTROL VALVE (1995) WHT WIRE WHT/GRN WIRE YEL WIRE

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

14/1 14/2 14/3 20/2 36/2 HOT AT ALL TIMES 5/1 12/1 12/2 ALTERNATOR BLK WIRE BLK/RED/YEL WIRE BLK/YEL WIRE BLU WIRE BRN WIRE COMBINATION SWITCH COUPE DAYTIME RUNNING LAMP CONTROL MODULE (BEHIND CENTER OF DASH) EXTERIOR LAMP FAILURE MONITORING UNIT (LEFT REAR OF ENG COMPT) EXTERIOR LAMP SWITCH FOG LAMP SWITCH FUSE 11 7.5 FUSE 13 FUSE 14 FUSE 15 FUSE 8 FUSE 12 FUSE 9 FUSE 10 FUSE 26 FUSE BOX FUSE BOX FUSE 24 GRN WIRE GRY WIRE GRY/RED WIRE GRY/VIO WIRE GRY/WHT WIRE GRY/YEL/GRN WIRE HEAD HEAD- LAMP HI FLASH LO HIGH BEAM INDICATOR HIGH LOW LEFT TAILLAMP UNIT RIGHT TAILLAMP UNIT HIGH RIGHT TAILLAMP UNIT HOT AT ALL TIMES HOT IN ACCY, RUN, OR START HOT IN RUN OR START INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM LEFT HEADLAMP UNIT LEFT TAILLAMP UNIT MAXI FUSE BOX NSE OFF PARK OFF RH PARK OFF RH PARK HEAD LH OFF RH PARK LH HEAD RED WIRE RH LH RIGHT HEADLAMP UNIT SEDAN SEDAN TAIL/ PARK TAIL/ PARK TAIL/ PARK VIO WIRE WHT WIRE WHT/YEL WIRE WIPER/ WASHER SYSTEM YEL 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

ANTI-THEFT ALARM CONTROL UNIT (RIGHT SIDE OF TRUNK) BLK WIRE BLK/GRN/VIO WIRE BLK/RED/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/PNK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/GRY WIRE BRN/GRY/YEL WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CA SUPPLY PUMP CONVENIENCE CONTROL UNIT (RIGHT SIDE OF TRUNK) FUSE 2 GRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START IGNITION/ STARTER SWITCH INFRARED REMOTE CONTROL UNIT (RIGHT SIDE OF TRUNK) LEFT FRONT DOOR ACTUATOR LEFT FRONT DOOR CLOSING ASSIST MICROSWITCH LEFT FRONT DOOR IR RECEIVER LEFT FRONT DOOR LOCK SWITCH LEFT FRONT DOOR ROTARY TUMBLER MICROSWITCH LUGGAGE COMPARTMENT FUSE BOX FUSE 15 NCA WIRE OFF PSE CONTROL MODULE RED WIRE RED/WHT WIRE RIGHT FRONT DOOR CLOSING ASSIST MICROSWITCH RIGHT FRONT DOOR IR RECEIVER RIGHT FRONT DOOR LOCK SWITCH RIGHT FRONT DOOR ROTARY TUMBLER MICROSWITCH RIGHT REAR DOOR CLOSING ASSIST MICROSWITCH RIGHT REAR DOOR ROTARY TUMBLER MICROSWITCH ROTARY TUMBLER/ TRUNK LID MICROSWITCH RUN WIRE STARTER LOCK-OUT RELAY MODULE TERMINAL TEST CONNECTION FOR DIAGNOSIS (RIGHT SIDE OF ENGINE COMPT) TRUNK LID IR RECEIVER TRUNK LID LOCK SWITCH YEL WIRE YEL/VIO WIRE YEL/WHT WIRE

1 2 3 4 5 6 PNK WIRE 65/1 68/2 78/1 82/2 78/2 82/1 BACKREST BACKREST HEAD RESTRAINT UP/DOWN BLK WIRE BLK/YEL WIRE BLU WIRE BLU/GRN WIRE BLU/WHT WIRE BRN WIRE BRN/GRY WIRE CONVENIENCE CONTROL UNIT (RIGHT SIDE OF LUGGAGE COMPT) CONVENIENCE RELAY (IN FUSE BOX) COUPE ONLY FUSE 30 FUSE 37 41 FUSE 38 40 FUSE BOX GRN WIRE GRY WIRE GRY/BRN WIRE HEAD RESTRAINT UP/DOWN HOT AT ALL TIMES INTERIOR LIGHTS SYSTEM (DOOR JAMB SWITCHES) LEFT FRONT ONLY LEFT FRONT RIGHT FRONT LEFT OR RIGHT FRONT DOOR PLUG CONNECTOR LEFT OR RIGHT FRONT POWER SEAT MOTOR GROUP WITH MEMORY LEFT OR RIGHT FRONT POWER SEAT SWITCH LEFT OR RIGHT FRONT SEAT MEMORY CONTROL UNIT (UNDER SEAT) LEFT OR RIGHT FRONT SEATBACK MICROSWITCH (COUPE ONLY) MEMORY MIRROR, STEERING COLUMN ADJUST CONTROL UNIT (RIGHT SIDE OF DASH) ORG/ WIRE PNK WIRE PNK/GRN WIRE POSITION 1 POSITION 2 POSITION 3 RED WIRE RED/BLK WIRE RED/BLK/YEL WIRE RED/WHT WIRE RED/YEL WIRE SEAT CUSHION HEIGHT SEAT FORWARD/ BACKWARD SEAT FWD/BACK SEAT HEIGHT REAR SEAT HEIGHT FRONT SEAT HEIGHT REAR TERMINAL VIO WIRE WHT WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/PNK WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/RED 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

BASE MODULE BLK WIRE BLK/RED WIRE BLK/RED/WHT WIRE BLK/RED/YEL WIRE BLK/YEL WIRE BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRN/VIO WIRE BRN/RED/GRN WIRE BRN/YEL WIRE CHECK ENGINE LIGHT COMPUTER DATA LINES CRUISE CONTROL SYSTEM DATA LINK CONNECTOR (DTC READOUT) (IN RIGHT COMPONENT COMPT.) DIAGNOSTIC MODULE (OBD II) SCAN TOOL CONNECTOR DIAGNOSTIC MODULE (OBD-II) DIAGNOSTIC MODULE PRESSURE SENSOR ENGINE CONTROL MODULE (HFM-SFI) (RIGHT FOOT- WELL) ETS/SPS CONTROL MODULE FUEL PUMP 1 FUEL PUMP RELAY MODULE FUSE 17 FUSE BOX FUSE 25 GRN WIRE GRN/RED WIRE GRN/WHT WIRE GRY WIRE GRY/YEL WIRE HEATER RELAY MODULE HOT AT ALL TIMES HOT IN RUN OR START IGNITION SWITCH INSTRU- MENT CLUSTER SYSTEM INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM LOCK P/N PURGE CONTROL VALVE PURGE- FLOW SWITCHOVER VALVE REAR FUSE BOX FUSE 13 RED WIRE RED/BLU WIRE RED/BLU/BLK WIRE RED/BLU/WHT WIRE RED/GRN WIRE RED/WHT WIRE RUN WIRE STARTER STARTER LOCK-OUT/ BACKUP LAMP SWITCH STOP LAMP SWITCH TERMINAL BLOCK TRANSMISSION CONTROL MODULE TRANSMISSION OVERLOAD PROTECTION SWITCH UPSHIFT DELAY SWITCH- OVER VALVE VIO WIRE VIO/BLU WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/YEL WIRE YEL WIRE YEL/BLK/GRN WIRE YEL/BLU WIRE YEL/RED WIRE YEL/VIO WIRE

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