Gmc-Truck·Savana·2017 GMC Truck Savana·Wiring
Wiring diagram

2017 GMC Truck Savana — power distribution

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Power distribution

1 2 1 2 3 4 3 4 5 5 5 15A 60A 60A P A 30 10A C B 25A 15A 40A 50A 10A 40A 10A 10A 10A 10A 10A 10A 10A 20A 20A 10A 10A 10A 20A 30A 30A 30 87 86 85 50A UNDERHOOD JUNCTION BLOCK ENGINE CONTROL MODULE FUSE HOLDER STARTER MOTOR REDUCTANT CONTROL MODULE RELAY 1 REAR BODY FUSE BLOCK FUSE HOLDER AUXILIARY BATTERY GENERATOR FUEL HEATER RELAY BATTERY ENGINE CONTROL MODULE FUEL HEATER FUSE BLOCK UNDERHOOD FUSE BLOCK REDUCTANT CONTROL MODULE RELAY 2 STARTER RELAY REDUCTANT CONTROL MODULE ELECTRONIC BRAKE CONTROL MODULE ENGINE CONTROL MODULE BLOWER MOTOR RESISTOR BODY CONTROL MODULE TRAILER CONNECTOR DATA LINK CONNECTOR PASSENGER COMPARTMENT FUSE BLOCK LOGIC COOLANT HEATER CHASSIS CONTROL MODULE PARKING ASSIST CONTROL MODULE EVAPORATIVE EMISSION VENT SOLENOID VALVE INSTRUMENT CLUSTER CONTROL SOLENOID VALVE ASSEMBLY TRANSMISSION CONTROL MODULE AUTOMATIC TRANSMISSION ASSEMBLY X2 A6 F6 X1 1 F5 C1 B8 C8 B1 X108 2 X108 1 5 X1 66 D1 1 X4 10 G X1 B1 X1 C X202 1 X5 A B4 4 X1 X1 4 C X2 16 G1 X3 C2 X2 D2 38 1 13 18 X1 A1 F2 X3 H2 K3 A5 J2 A7 A4 X1 20 A X3 3 2 X2 2 X4 3 1 2 A3 4 J1 A A C C B4 F2 X1 A2 X3 A2 E5 X2 X3 X2 B1 A 2 20 D1 E X2 F2 X1 F1 B B X222 X321 E2 RED/WHT RED/WHT RED/WHT (OR RED) RED/YEL RED/YEL RED/YEL RED/YEL RED/YEL (OR RED) RED/YEL RED/ YEL RED/ (OR RED/GRN) RED/WHT RED/GRN (OR RED/GRN) RED RED YEL RED BLK BRN BRN RED/WHT (OR RED/BRN) RED/WHT RED/WHT BLK RED RED RED RED/WHT RED/WHT RED/WHT RED RED RED RED/WHT BLK RED/WHT RED/BLK RED/WHT RED RED RED RED RED RED/WHT RED/WHT RED/WHT RED/WHT RED/WHT RED/BLK RED/WHT RED/WHT RED/WHT RED/WHT RED/WHT RED/WHT BLK BLK BLK RED/WHT RED/WHT RED/WHT RED/WHT RED/WHT RED/BLK BRN BRN BRN BRN BLK BLK (2.8L TURBO DIESEL) (2.8L TURBO DIESEL) (2.8L TURBO DIESEL) (2.8L TURBO DIESEL) 2.8L TURBO DIESEL W/ ACTIVE BRAKE CONTROL 4.8L & 6.0L W/O ACTIVE BRAKE CONTROL (2.8L TURBO DIESEL) 6 (TRAILER PROVISION BLUNT CUT) (W/ AUXILIARY FUEL FIRED HEATER) (4.8L & 6.0L) (W/ ODOMETER SECURITY WIRING PROVISION (SEO)) (4.8L & 6.0L) W/ CIGARETTE LIGHTER W/O CIGARETTE LIGHTER CUTAWAY & RV UPFITTERS AMBULANCE UPFITTERS W/O TRUCK TRAILER & FUEL TANK W/ TRUCK TRAILER & FUEL TANK 6 4.8L & 6.0L 2.8L TURBO DIESEL 6 W/ CUTAWAY UPFITTER W/ RV UPFITTER (ENERGENCY VEHICLE PROVISIONAL BLUNT CUT) (CONFIGURABLE PROVISION BLUNT CUT) G305 G302 G304 FUSE 1 FUSE 1 FUSIBLE LINK 3 FUSIBLE LINK 2 NOX SENSOR 2 FUSE BCM 3 FUSE BCM 6 FUSE ABS MDL FUSE BCM 4 FUSE FRT BLWR FUSE BCM 5 FUSE BCM 7 FUSE ECM BATT FUSE BCM 1 FUSE ABS MTR FUSE BCM 2 FUSE AUX PWR OUTLET FUSE LTR/DLC FUSE OBSDET FUSE TRLR WRG FUSE 11 CNSTR VENT SOL FUSE FSCM BATT FUSE TCM BATT FUSE SEO FUSE FOH MDL FUSE TRLR WRG FUSE 42 IGNITION POWER PROVISION RELAY CIGARETTE LIGHTER RECEPTACLE CENTER CONSOLE ACCESSORY POWER RECEPTACLE 1 CENTER CONSOLE ACCESSORY POWER RECEPTACLE 2 UPFITTER AUX 2 FUSE J135 J241 J247 J249 (BETWEEN STARTER MOTOR & UNDERHOOD FUSE BLOCK) (IN ENGINE HARNESS, NEAR FUSE BLOCK-FUEL HEATER BREAKOUT) (IN ENGINE COMPT) (IN ENGINE COMPT) (LEFT CENTER OUTER FRAME RAIL, NEAR SECONDARY BATTERY) (IN ENGINE COMPT) (LEFT SIDE OF ENGINE COMPT) (INSTRUMENT PANEL HARNESS, NEAR PARKING ASSIST CONTROL MODULE BREAKOUT) (UNDER DRIVER'S SEAT) (LEFT KICK PANEL) (RIGHT KICK PANEL) TO AUXILIARY BATTERY RELAY 1 (DIAGRAM 5 OF 5) TO HEADLAMP HIGH BEAM RELAY (DIAGRAM 2 OF 5) FROM IGNITION RUN RELAY (DIAGRAM 4 OF 5) FROM CMPS FUSE (DIAGRAM 4 OF 5)
1 2 2 1 1 2 1 1 2 1 2 15A 15A A 30A 40A M 25A K 10A K 15A 20A 30 85 D 25A 87 86 15A 10A 10A 125A E 85 30 30 20A UNDERHOOD FUSE BLOCK HORN RELAY STOP LAMP RELAY WINDSHIELD WASHER PUMP RELAY A/C COMPRESSOR CLUTCH RELAY LEFT TRAILER STOP/TURN SIGNAL LAMP RELAY DAYTIME RUNNING LAMPS RELAY HEADLAMP LOW BEAM RELAY RIGHT TRAILER STOP/TURN SIGNAL LAMP RELAY HEADLAMP HIGH BEAM RELAY WINDSHIELD WIPER SPEED CONTROL RELAY FUEL PUMP RELAY WINDSHIELD WIPER RELAY COOLING FAN RELAY FUEL COMPOSITION SENSOR MULTI- FUNCTION INTAKE AIR SENSOR EVAPORATIVE EMISSION PURGE SOLENOID VALVE HEATED OXYGEN SENSOR BANK 2 SENSOR 1 HEATED OXYGEN SENSOR BANK 1 SENSOR 1 HEATED OXYGEN SENSOR BANK 2 SENSOR 2 ENGINE CONTROL MODULE HEATED OXYGEN SENSOR BANK 1 SENSOR 2 ENGINE CONTROL MODULE UNDERHOOD FUSE BLOCK POSITIVE CRANKCASE VENTILATION HEATER FUEL INJECTOR 3 FUEL INJECTOR 7 FUEL INJECTOR 5 FUEL INJECTOR 1 IGNITION COIL 2 IGNITION COIL 4 IGNITION COIL 8 IGNITION COIL 6 FUEL INJECTOR 2 FUEL INJECTOR 8 FUEL INJECTOR 6 FUEL INJECTOR 4 IGNITION COIL 5 IGNITION COIL 7 IGNITION COIL 1 IGNITION COIL 3 2 J5 X1 3 J4 X1 1 F1 X6 X1 X1 X3 E2 5 2 A A X126 H X127 H B2 X2 1 51 2 2 2 2 40 X1 G5 G4 H2 K8 X2 28 A K1 K4 G1 G2 G3 X1 J2 J3 J1 A A D D D D D D D D A A A A VIO/BLU VIO/BLU VIO/BLU VIO/BLU (OR VIO/GRY) (OR PNK) VIO/BLU RED/WHT PNK PNK PNK PNK PNK PNK PNK PNK PNK PNK VIO/WHT VIO/BLU VIO/BLU PNK PNK PNK PNK PNK PNK PNK PNK PNK PNK/BLK PNK PNK PNK PNK WHT WHT PNK PNK BLK BLK VIO/WHT PNK PNK YEL RED PNK PNK PNK PNK PNK PNK PNK PNK PNK PNK (MANUAL A/C) 4.8L & 6.0L (4.8L & 6.0L) 4.8L & 6.0L 2.8L TURBO DIESEL (2.8L TURBO DIESEL) (4.8L & 6.0L) (4.8L & 6.0L) (2.8L TURBO DIESEL) WPR FUSE FAN HI FUSE ENGINE CONTROLS IGNITION RELAY AC/DC INV FUSE O2 SNSR 2 (POST)/EV FAN FUSE ECM PWR/TRN FUSE O2 SNSR 1 (PRE)/CLS FUSE FUEL HTR/ FLEX FUEL SNSR FUSE MEGA FUSE MAF/CNSTR VENT/ HUMIDITY SENSOR FUSE ECM FUSE ODD IGN/ INJ FUSE CRANKCASE VENT HTR FUSE EVEN IGN/ INJ FUSE J144 J143 J185 J184 (LEFT SIDE OF ENGINE COMPT) (ENGINE HARNESS, NEAR HEATED OXYGEN SENSOR- BANK 1 SENSOR 2 & HEATED OXYGEN OXYGEN SENSOR- BANK 2 SENSOR 2) (ENGINE HARNESS, NEAR HEATED OXYGEN SENSOR- BANK 1 SENSOR 1 & HEATED OXYGEN OXYGEN SENSOR- BANK 2 SENSOR 1) (LEFT SIDE OF ENGINE COMPT) (IN EVEN IGNITION/ COIL MODULE JUMPER HARNESS, ON TOP RIGHT SIDE OF ENGINE) (IN ODD IGNITION/COIL MODULE JUMPER HARNESS, ON TOP LEFT SIDE OF ENGINE) FROM TRLR WRG FUSE 42 (DIAGRAM 1 OF 5) TO IGNITION RUN/CRANK RELAY (DIAGRAM 3 OF 5) TO EVEN IGN/INJ FUSE (DIAGRAM 2 OF 5) TO PASSENGER COMPARTMENT FUSE BLOCK (DIAGRAM 4 OF 5) TO ACCESSORY DC/AC POWER INVERTER MODULE (DIAGRAM 5 OF 5) FROM MAF/ CNSTR VENT/ HUMIDITY SENSOR FUSE (DIAGRAM 2 OF 5)
10A H G F IGN 5V H J START ACC RUN OFF START OFF ACC RUN START ACC RUN START RUN OFF OFF ACC 15A 10A 10A D 30 10A 86 85 87 REAR BODY FUSE BLOCK LEFT FRONT ACCESS PANEL RELAY LEFT REAR ACCESS PANEL RELAY RIGHT REAR ACCESS PANEL RELAY CONTENT THEFT DETERRENT CONTROL MODULE BODY CONTROL MODULE CONTROL SOLENOID VALVE ASSEMBLY ENGINE CONTROL MODULE AUTOMATIC TRANSMISSION ASSEMBLY CHASSIS CONTROL MODULE TRANSMISSION CONTROL MODULE UNDERHOOD FUSE BLOCK LOGIC INSTRUMENT CLUSTER INFLATABLE RESTRAINT SENSING & DIAGNOSTIC MODULE PASSENGER AIR BAG DISABLE SWITCH STEERING WHEEL ANGLE SENSOR WATER IN FUEL SENSOR CHASSIS CONTROL MODULE FUEL HEATER/WAYER IN FUEL SENSOR 51 5 21 X2 A8 9 X1 X101 16 8 X1 7 18 X1 X1 19 A X289 18 C6 C1 B6 X100 19 X200 A9 X200 A6 X318 C2 4 6 5 4 X1 2 2 3 14 21 1 2 6 11 X4 21 19 1 B3 X3 C2 B2 X3 D2 X3 A1 C7 X1 B 17 7 19 (OR VIO/YEL) VIO/BLU (OR PNK) VIO/GRY PNK VIO/GRY DK BLU DK BLU DK BLU DK BLU DK BLU DK BLU DK BLU RED/BLK BRN WHT PNK PNK PNK DK BLU RED/WHT WHT RED/ RED ORG WHT PNK BRN BRN RED/WHT BRN ORG ORG YEL DK BLU ORG PNK PNK PNK YEL PNK BLK PNK PNK PNK BLK W/ COMMERCAL TRADESMAN 4.8L & 6.0L 4.8L & 6.0L 2.8L TURBO DIESEL 2.8L TURBO DIESEL 4.8L & 6.0L (W/ ACTIVE BRAKE CONTROL) 2.8L TURBO DIESEL 4.8L & 6.0L G102 IGNITION SWITCH KEY-IN SWITCH PANEL ACTUATOR FUSE IGNITION RUN/CRANK RELAY STR/WHL SNSR FUSE IPC FUSE FSCM IGN FUSE AIRBAG FUSE J203 J205 J377 J115 J102 (IN STEERING COLUMN HARNESS, NEAR X200 CONNECTOR) (IN CARGO AREA) (IN STEERING COLUMN HARNESS, NEAR X200 CONNECTOR) (IN ENGINE HARNESS, NEAR X101 BREAKOUT) (LEFT SIDE OF ENGINE COMPT) (REAR OF LEFT CYLINDER BANK) FROM PASSENGER COMPARTMENT FUSE BLOCK (DIAGRAM 4 OF 5) FROM PASSENGER COMPARTMENT FUSE BLOCK (DIAGRAM 4 OF 5) FROM BODY CONTROL MODULE (DIAGRAM 3 OF 5) TO SPLICE J115 (DIAGRAM 3 OF 5) FROM MEGA FUSE (DIAGRAM 2 OF 5) TO DISPLAY MIR/REAR BLU CAMERA FUSE (DIAGRAM 5 OF 5)
1 2 1 2 3 1 3 3 1 L N 15A 15A B C F 10A G 25A 87 85 30 86 50A 30 5A 10A 25A 2A 10A 10A 15A E 85 10A 30 30A 10A 30 87 86 85 20A 10A DOOR LOCK RELAY PASSENGER/ CARGO DOOR UNLOCK RELAY DRIVER DOOR UNLATCH RELAY CARGO DOOR UNLOCK RELAY COURTESY LAMPS PROVISION RELAY BODY CONTROL MODULE DRIVER WINDOW SWITCH PASSENGER WINDOW SWITCH BODY CONTROL MODULE PASSENGER COMPARTMENT FUSE BLOCK PARK LAMPS RELAY DRIVER SEAT ADJUSTER SWITCH TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE INFLATABLE RESTRAINT SENSING & DIAGNOSTIC MODULE HVAC CONTROLS SWITCH ASSEMBLY REMOTE CONTROL DOOR LOCK RECEIVER LOGIC INSTRUMENT CLUSTER OUTSIDE REAR VIEW MIRROR SWITCH DIGITAL RADIO RECEIVER CONTROL MODULE PASSENGER SEAT ADJUSTER SWITCH RADIO REAR DEFOGGER RELAY BACKUP LAMP RELAY PROVISIONAL PROVISIONAL HVAC CONTROLS SWITCH ASSEMBLY BODY CONTROL MODULE AIR TEMPERATURE DOOR ACTUATOR HVAC CONTROL SWITCH ASSEMBLY COMPASS MODULE AUXILIARY HVAC CONTROL MODULE AUXILIARY AIR TEMPERATURE DOOR ACTUATOR AUXILIARY BLOWER MOTOR LOW SPEED RELAY AUXILIARY BLOWER MOTOR MEDIUM SPEED RELAY AUXILIARY MODE DOOR ACTUATOR AUXILIARY FRONT HVAC CONTROL SWITCH ASSEMBLY AUXILIARY BLOWER MOTOR HIGH SPEED RELAY AUXILIARY REAR HVAC CONTROLS SWITCH ASSEMBLY C5 F X205 X1 A X409 X407 E X1 X7 2 X1 K2 X407 E X409 A X307 1 X1 15 B1 C2 X2 B3 X1 16 X200 B1 X500 D6 X205 A X421 6 X600 B5 X306 9 X500 C8 J1 G3 G1 X2 A C G2 E2 X1 H4 E1 X2 11 X5 X222 A X321 A A6 H8 X1 B1 X1 B2 H7 H5 H6 G4 X2 E2 X2 A3 A2 A1 F1 X2 E 1 F F X3 A 20 1 C4 H2 C3 C1 C1 C1 10 10 C2 C2 C2 1 G J G 9 X1 B3 C5 D5 10 E2 C7 E X2 13 X5 B X3 BRN BRN BRN BRN BRN RED/ BRN WHT BRN BRN BRN BRN RED/WHT RED/WHT RED/WHT RED/BLK RED/BLK RED/ WHT WHT RED/ RED/ WHT BRN BRN RED/ WHT RED/ WHT RED/ WHT YEL YEL DK BLU BRN WHT RED/ WHT RED/ RED/WHT RED/WHT RED/WHT RED/ WHT RED/WHT GRN DK GRN DK ORG BLK BRN BRN BRN BRN BRN BRN GRN DK DK RED/ WHT RED/ WHT GRN BLK BLK RED/WHT RED/WHT RED/WHT YEL RED/BLK RED/WHT RED/WHT RED/WHT RED/BLK RED/BLK RED/BLK RED/WHT RED RED/BLK BRN BRN BRN BRN BRN BRN BRN BRN BRN BRN BRN BLK W/ RV UPFITTER (NOT USED) (NOT USED) W/ CUTAWAY UPFITTER W/ RV UPFITTER W/ COMMERCIAL TRADESMAN W/ FRONT & REAR HVAC CONTROLS W/ REAR HVAC CONTROLS W/O REAR HVAC CONTROLS (EMERGENCY VEHICLE PROVISION BLUNT CUT) (IF EQUIPPED) (CONFIGURABLE PROVISION BLUNT CUT) (IF EQUIPPED) (NOT USED) (NOT USED) (IF EQUIPPED) (W/ ELECTRIC REAR WINDOW DEFOGGER & POWER MIRRORS) (IF EQUIPPED) (W/O ODOMETER SECURITY WIRING PROVISION (SEO)) (IF EQUIPPED) (IF EQUIPPED) (IF EQUIPPED) (IF EQUIPPED) MANUAL A/C REAR A/C REAR A/C MANUAL A/C (W/ REAR WINDOW DEFOGGER & MANUAL A/C) (W/ REAR WINDOW DEFOGGER & MANUAL A/C) (IF EQUIPPED) G302 G302 RETAINED ACCESSORY POWER RELAY UPFITTER AUX1 FUSE PWR WINDOWS CIRCUIT BREAKER EMPTY FUSE EMPTY FUSE HVAC CNTRL FUSE I/P CLUSTER FUSE PWR SEATS CIRCUIT BREAKER 1 IGN SW (DLIS)/PK3 FUSE AIRBAG/AOS FUSE RFA/TPM FUSE ONSTAR FUSE RDO/CHIME FUSE OSRVM SW FUSE IGNITION RUN RELAY REAR BLOWER FUSE CMPS FUSE HVAC 2 FUSE HVAC 1 FUSE J247 (W/ BAND & TRAFFIC DIGITAL SUDIO SYSTEM) J270 J247 J263 J307 J405 J412 (LEFT KICK PANEL) (UNDER DRIVER'S SEAT) (IN INSTRUMENT PANEL HARNESS, NEAR DIGITAL RADIO RECEIVER BREAKOUT) (IN REAR HVAC HARNESS, NEAR AUXILIARY BLOWER MOTOR RELAY BREAKOUT) (IN FRONT HEADLINER HARNESS, NEAR X205 BREAKOUT) (IN REAR HVAC HARNESS, NEAR AUXILIARY BLOWER MOTOR RELAY BREAKOUT) (LEFT KICK PANEL) FROM UNDERHOOD FUSE BLOCK (DIAGRAM 2 OF 5) TO REAR BODY FUSE BLOCK (DIAGRAM 3 OF 5) TO SPLICE J203 (DIAGRAM 3 OF 5) TO IGNITION POWER PROVISION RELAY (DIAGRAM 1 OF 5) TO AUXILIARY BATTERY RELAY 1 (DIAGRAM 5 OF 5) TO 110V AC ACCESSORY POWER RECEPTACLE (DIAGRAM 5 OF 5)
30A 10A P L 30A 87 30 85 86 30 87 86 85 120V AC NEUTRAL DC TO AC INVERTER CTRL 2 SIG GND GND BATT 120V AC PHASE A N M 10A J 15A 15A 15A UNDERHOOD FUSE BLOCK CONTROL SOLENOID VALVE ASSEMBLY ENGINE CONTROL MODULE TRANSMISSION CONTROL MODULE ENGINE CONTROL MODULE AUTOMATIC TRANSMISSION ASSEMBLY INSIDE REAR VIEW MIRROR REAR VIEW CAMERA AUXILIARY BATTERY X2 A X3 B X1 B X1 A X202 M 3 3 4 4 1 1 2 2 X190 X190 5 X291 5 C6 C7 B4 B5 C8 A6 A7 B8 C1 B1 C10 B10 B3 C3 35 E X204 1 X1 1 3 X2 3 X1 2 1 4 3 5 7 9 8 6 10 11 12 E X329 X403 E 6 13 X3 C1 19 X1 X1 12 D2 B5 X1 D3 X1 22 BLK/WHT RED/BLK RED/BLK BLK RED RED RED BLK/WHT RED/WHT RED/WHT RED/WHT RED/WHT LT GRN LT GRN LT BLU LT BLU DK GRN DK GRN DK BLU DK BLU BLK/WHT BLK/WHT RED/WHT RED/BLK RED/BLK RED/WHT BLK RED/BLK RED/WHT RED/WHT BLK RED/WHT LT GRN LT BLU DK BLU DK GRN VIO/BLK (OR PNK) VIO/BLK (OR PNK) VIO/GRN PNK BLK BLK/WHT BLK/WHT BLK DK BLU WHT DK GRN BLK WHT RED/WHT BLK BLK/WHT DK GRN PNK PNK PNK NCA PNK PNK PNK PNK VIO/GRN (NOT USED) (SHIELD BLUNT CUT) W/ REAR VIEW VISION (IF EQUIPPED) 2.8L TURBO DIESEL 4.8L & 6.0L 4.8L & 6.0L 2.8L TURBO DIESEL (DUAL BATTERY) (4.8L & 6.0L) (CONFIGURABLE PROVISION BLUNT CUT) G304 G103 G103 G103 G305 DISPLAY MIR/REAR B/U CAMERA FUSE ECM IGN/ GLOW PLUG MDL IGN FUSE TRANS FUSE TCM IGN FUSE 110V AC ACCESSORY POWER RECEPTACLE ACCESSORY DC/AC POWER INVERTER MODULE UNDERHOOD AUXILIARY FUSE BLOCK CIRCUIT BREAKER 3 CIRCUIT BREAKER 2 CIRCUIT BREAKER 1 CONFIGURABLE PROVISION RELAY 1 CONFIGURABLE PROVISION RELAY 2 AUXILIARY BATTERY RELAY 1 FUSIBLE LINK 6 J334 J249 J105 J106 J106 J101 (LEFT SIDE OF ENGINE COMPT) (BODY HARNESS, NEAR REAR BODY FUSE BLOCK) (RIGHT KICK PANEL) (LEFT SIDE OF DASH) (IN FUSE BLOCK JUMPER HARNESS, BETWEEN AUXILIARY BATTERY RELAY 1 & FUSE BLOCK- UNDERHOOD AUXILIARY) (REAR OF LEFT CYLINDER BANK) (REAR OF LEFT CYLINDER BANK) (REAR OF LEFT CYLINDER BANK) (LEFT CENTER OUTER FRAME RAIL, NEAR SECONDARY BATTERY) 5683 5685 4140 550 2266 1351 FROM PASSENGER COMPARTMENT FUSE BLOCK (DIAGRAM 4 OF 5) FROM IPC FUSE (DIAGRAM 3 OF 5) FROM UNDERHOOD FUSE BLOCK (DIAGRAM 2 OF 5) FROM SPLICE J263 (DIAGRAM 4 OF 5) FROM UNDERHOOD JUNCTION BLOCK (DIAGRAM 1 OF 5)