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

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

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

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

22/3 36/2 8 3 (ADS II) (ADS I) ADS CONTROL MODULE (IN MODULE BOX, RIGHT REAR OF ENGINE COMPT) ANTI-LOCK BRAKES SYSTEM ANTI-LOCK BRAKES SYSTEM EXTERIOR LIGHTS SYSTEM AUDIBLE TURN SIGNAL INDICATOR BASE MODULE (IN MODULE BOX) BLK WIRE BLK/GRN WIRE BLK/RED/VIO WIRE BLK/WHT WIRE BLK/YEL/RED WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BLU/YEL/RED WIRE BRAKE FLUID LEVEL SWITCH BRAKE PAD WEAR INDICATOR BRN WIRE BRN/BLK WIRE BRN/BLU (OR BLU/GRN) WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CANADA ONLY CHARGE INDICATOR CHECK ENGINE INDICATOR COMBINATION RELAY (IN FUSE BOX) COOLANT LEVEL INDICATOR COOLANT LEVEL SWITCH COOLANT TEMP GAUGE COOLANT TEMPERATURE GAUGE SENSOR DIAGNOSTIC MODULE ELECTRONIC CLOCK ELECTRONIC SPEEDOMETER ENGINE CONTROL MODULE EXTERIOR LAMP FAILURE INDICATOR EXTERIOR LIGHTS SYSTEM WARNING SYSTEM FUEL CONSUMPTION INDICATOR FUEL LEVEL GAUGE FUEL LEVEL SENSOR FUEL RESERVE INDICATOR FUSE 24 FUSE BOX FUSE 17 GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRY/BLU WIRE GRY/RED WIRE GRY/VIO WIRE HEADLIGHTS SYSTEM HIGH BEAM INDICATOR HOT AT ALL TIMES HOT IN RUN OR START IGNITION SWITCH ILLUMINATION INDICATOR ABS INDICATOR ADS INDICATOR ASR INDICATOR ASR WARNING INDICATOR SRS INDICATOR, PARK BRAKE BRAKE FLUID INSTRUMENT CLUSTER LEFT REAR BRAKE PAD BRAKE PAD WEAR SENSOR WEAR SENSOR LEFT TURN INDICATOR LH-SFI CONTROL MODULE OFF OIL LEVEL INDICATOR OIL LEVEL SWITCH OIL PRESSURE GAUGE OIL PRESSURE SENSOR OUTSIDE TEMPERATURE INDICATOR OUTSIDE TEMPERATURE SENSOR PARKING BRAKE SWITCH PNK WIRE PNK/YEL WIRE PNK/YEL/BLK WIRE REAR AXLE MULTIPLE CIRCUIT JUNCTION CONNECTOR RED WIRE RED/BLU WIRE RED/WHT WIRE RHEOSTAT RIGHT FRONT BRAKE PAD WEAR SENSOR RIGHT REAR BRAKE PAD WEAR SENSOR RIGHT TURN INDICATOR RUN WIRE SEAT BELT INDICATOR STARTING/CHARGING SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM TACHOMETER TERMINAL BLOCK (RIGHT FOOTWELL) VIO WIRE WARNING BUZZER WHT WIRE WHT/BLK WIRE WINDSHIELD WASHER FLUID INDICATOR WINDSHIELD WASHER FLUID LEVEL SWITCH YEL WIRE YEL/BLK WIRE YEL/RED WIRE YEL/VIO WIRE

29/2 BLK WIRE BLK/RED WIRE BLL/RED WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/RED WIRE CONVENIENCE CONTROL UNIT (RIGHT SIDE OF TRUNK) CONVENIENCE RELAY (IN FUSE BOX) ELECTRICALLY ADJUSTABLE, HEATED DRIVER'S SIDE OUTSIDE REARVIEW MIRROR ELECTRICALLY ADJUSTABLE, HEATED FRONT PASSENGER OUTSIDE REARVIEW MIRROR ELECTRONIC STEERING COLUMN ADJUSTMENT SWITCH ELECTRONIC STEERING COLUMN MOTOR GROUP ESC CONTROL CONNECTOR FOLDING MOTOR FUSE 21 FUSE 30 FUSE BOX GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/WHT WIRE GRY/YEL WIRE HORIZONTAL ADJUSTMENT HOT AT ALL TIMES TERMINAL HOT IN RUN LEFT POWER SEAT CONTROL UNIT (UNDER LEFT FRONT SEAT) MIRROR HEATER MIRROR POSITION MIRROR SELECT OUTSIDE REARVIEW MIRROR SWITCH (W/ MEMORY, FOLD-IN/ FOLD-OUT FEATURE) RED WIRE RED/BLK WIRE RED/WHT WIRE STEERING COLUMN IN/OUT STEERING COLUMN UP/DOWN TELESCOPIC ADJUSTMENT TERMINAL TILT ADJUSTMENT VERTICAL ADJUSTMENT WHT WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/WHT WIRE

17/2 17/1 32/1 20/2 32/2 47 -1 47 -2 74/2 74/1 71/2 20/1 A/C SYSTEM BLOWER UNIT ABS/ASR HYDRAULIC UNIT ACCY AIRBAG INDICATOR ANTI- THEFT ALARM SYSTEM, INFRARED REMOTE CONTROL, REAR HEATED SEATS ANTI-THEFT ALARM SYSTEM, INFRARED REMOTE CONTROL, REAR HEAD RESTRAINTS BASE MODULE BATTERY BLK WIRE BLU WIRE BRN WIRE CANADA CENTRAL LOCKING, CLOSING ASSIST CONVENIENCE FEATURE DAYTIME RUNNING LAMPS ELECTROLYTIC CAPACITOR ETS/SPS CONTROL MODULE FRONT CIGAR LIGHTER FUEL PUMPS FUSE 11 FUSE 12 FUSE 15 FUSE 16 FUSE 16 FUSE 13 FUSE 14 FUSE 15 FUSE 17 FUSE 1 FUSE 2 FUSE 22 FUSE 3 FUSE 4 (RIGHT FRONT OF LUGGAGE COMPART- MENT) (NOT USED) FUSE 34 FUSE 35 FUSE 5 FUSE 2 FUSE 4 FUSE 5 FUSE 6 FUSE 7 FUSE 9 FUSE 10 FUSE 6 (LEFT REAR OF ENGINE COMPART- MENT) FUSE BOX GRN WIRE GRN/BLK WIRE GRY WIRE HEATED REAR WINDOW HEATED SEATS HEATED SEATS, DEFOGGER, RELAY MODULE, SEAT BELT EXTENDER IGNITION/ STARTER SWITCH INFRARED CENTRAL LOCKING MAXI FUSE BOX NCA WIRE OFF PNK WIRE PNK/ PNK/ PNK/ TO FUSE BOX PNK/ WIRE PREGLOW TIME-LIMIT RELAY RADIO SOUND SYSTEM: TUNER, AMPLIFIER REAR CIGAR LIGHTER REAR CLIMATE CONTROL REAR FUSE BOX REAR ILLUMINATED VANITY MIRROR POWER WINDOWS REAR WINDOW SUNSHIELD, CONVENIENCE SYSTEM SRS CONTROL UNIT RED WIRE RUN WIRE SEATBELT WARNING MODULE SLIDING/ POP-UP ROOF STARTER LOCK-OUT/ BACK-UP LAMP RELAY SELECTOR LEVER POSITION RECOGNITION FUSE 3 TELE- PHONE TERMINAL TERMINAL BLOCK TERMINAL BLOCK X/4 TO COMBINATION SWITCH (DIAGRAM 2 OF 2) TO EXTERIOR LAMP SWITCH TO FUSE BOX, (DIAGRAM 2 OF 2) TO TERMINAL BLOCK (DIAGRAM 2 OF 2) VIO WIRE WHT WIRE WIPER MOTOR AUXILIARY FAN RELAY WIPER RELAY, WASHER PUMP, COMBINATION RELAY, REAR WINDOW DEFOGGER SWITCH YEL WIRE YEL/BLK WIRE

BLK WIRE BLK/BLU WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BRN WIRE BRN/GRY WIRE CENTER CONSOLE CENTER CONSOLE REAR POWER WINDOWS CONVENIENCE CONTROL UNIT DATA LINK CONNECTOR DN TO LIMIT DN TO LIMIT UP DN UP TO LIMIT DN TO LIMIT UP TO LIMIT UP DN UP TO LIMIT FRONT CENTER CONSOLE LEFT FRONT POWER WINDOW SWITCH FRONT CENTER CONSOLE LEFT REAR POWER WINDOW SWITCH FRONT CENTER CONSOLE RIGHT REAR POWER WINDOW SWITCH FUSE 11 FUSE 5 FUSE 6 FUSE BOX FUSE 35 GRN WIRE GRN/BLU WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT IN ACC, RUN, START LEFT FRONT DOOR SWITCH LEFT FRONT POWER WINDOW MOTOR LEFT REAR POWER WINDOW MOTOR LEFT REAR POWER WINDOW SWITCH PNK/BLK WIRE PNK/BLU WIRE PNK/GRN WIRE PNK/GRY WIRE PNK/VIO WIRE PNK/WHT WIRE PNK/YEL WIRE REAR FUSE BOX RED/GRN WIRE RED/WHT WIRE RED/WHT/YEL WIRE RED/YEL WIRE RIGHT FRONT DOOR SWITCH RIGHT FRONT POWER WINDOW MOTOR RIGHT FRONT POWER WINDOW SWITCH RIGHT REAR POWER WINDOW MOTOR RIGHT REAR POWER WINDOW SWITCH SAFETY SWITCH UP DN UP DN TO LIMIT UP TO LIMIT WHT/GRN WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/GRN WIRE YEL/GRY WIRE YEL/VIO WIRE YEL/WHT WIRE

69/1 BLK/BRN WIRE BLK/GRN WIRE BLK/PNK WIRE BLK/VIO WIRE BLK/YEL WIRE BRN WIRE CENTER CONSOLE FUSE 15 FUSE 32 FUSE BOX GRN/BLK WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT IN ACCY, RUN, OR START INTERIOR LIGHTS SWITCH LEFT REAR HEAD RESTRAINT MOTOR LEFT REAR HEAD RESTRAINT RAISE/LOWER SWITCH REAR FUSE BOX REAR HEAD RESTRAINT CONTROL MODULE (BELOW LEFT REAR SEAT) REAR HEAD RESTRAINT SWITCH (CONSOLE) RED/GRN WIRE RED/YEL WIRE RIGHT REAR HEAD RESTRAINT MOTOR RIGHT REAR HEAD RESTRAINT RAISE/LOWER SWITCH YEL/BLK WIRE

2 11 9 18 19 17 16 8 10 13 20 12 PNK WIRE 69/2 BACKREST ADJUSTMENT BACKREST FWD/ BKWD BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/PNK WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/BLK WIRE CENTER CONSOLE CONVENIENCE CONTROL UNIT (RIGHT SIDE OF TRUNK) CONVENIENCE RELAY (IN FUSE BOX) CUSHION ANGLE FUSE 31 FUSE BOX GRN WIRE GRN/BLK WIRE GRY WIRE GRY/BLU WIRE HEAD RESTRAINT UP/DOWN HOT AT ALL TIMES LEFT REAR DOOR PLUG CONNECTION LEFT REAR DOOR PLUG CONNECTOR LEFT REAR SEAT CUSHION ADJUSTMENT SWITCH LUGGAGE COMPARTMENT FUSE BOX FUSE 15 PNK WIRE PNK/BLK WIRE REAR BACKREST ADJUSTMENT REAR HEAD RESTRAINT REAR HEAD RESTRAINT CONTROL UNIT (BELOW REAR SEAT) REAR HEAD RESTRAINT SWITCH RED WIRE RED/BLK WIRE RED/WHT WIRE RED/YEL WIRE RIGHT REAR DOOR PLUG CONNECTION RIGHT REAR DOOR PLUG CONNECTOR RIGHT REAR SEAT CUSHION ADJUSTMENT SWITCH TERMINAL VIO WIRE WHT WIRE YEL WIRE YEL/BLK WIRE