X50A Fuse Block - Underhood Label
X50A FUSE BLOCK - UNDERHOOD FUSE AND RELAY IDENTIFICATION LEGEND
| No. | Device Label Name | Device Assigned Name | Rating | Description |
|---|---|---|---|---|
| Fuses | ||||
| 1 | STARTER 1 Fuse | F1UA Fuse | 30A | KR27 Starter Relay |
| 2 | STARTER 2 Fuse | F2UA Fuse | 40 A | KR27C Starter Pinion Solenoid Actuator Relay |
| 3 | NON/WALK Fuse | F3UA Fuse | 15 A | B52A Heated Oxygen Sensor 1, K20 Engine Control Module, KR27 Starter Relay, Q12 Evaporative Emission Purge Solenoid Valve, Q40 Turbocharger Bypass Solenoid Valve (LTG), Q42 Turbocharger Wastegate Solenoid Valve (LTG), and Q44 Engine Oil Pressure Control Solenoid Valve |
| 4 | ECM Fuse | F4UA Fuse | 25 A | K20 Engine Control Module |
| 5 | FLEX/FUEL Fuse | F5UA Fuse | 10 A | M96 Active Grille Air Shutter Actuator, and KR31 Coolant Pump Relay - Auxiliary |
| 6 | EMPTY/TCM Fuse | F6UA Fuse | 20 A | Not Used |
| 7 | EMPTY | F7UA Fuse | 10A | Not Used |
| 8 | ECM Fuse | F8UA Fuse | 10 A | K20 Engine Control Module |
| 9 | AC Fuse | F9UA Fuse | 10 A | KR29 A/C Compressor Clutch Relay |
| 10 | CNSTR/VENT/SOL | F10UA Fuse | - | Q13 Evaporative Emission Vent Solenoid Valve |
| 11 | FUEL/PUMP Fuse | F11UA Fuse | 20 A | K111 Fuel Pump Driver Control Module |
| 12 | HTD/SEAT Fuse | F12UA Fuse | 15 A | K29 Seat Heating Control Module |
| 13 | ENG/COOL/PUMP Fuse | F13UA Fuse | 7.5 A | KR31 Coolant Pump Relay - Auxiliary |
| 14 | EMPTY | F14UA Fuse | - | Not Used |
| 15 | 02 SNSR Fuse | F15UA Fuse | 10 A | B52B Heated Oxygen Sensor 2, B75C Multifunction Intake Air Sensor, and B280 Automatic Transmission Accumulator Solenoid Valve |
| 16 | IGN/COIL/ODD Fuse | F16UA Fuse | 15 A | K20 Engine Control Module, T8A Ignition Coil 1, T8B Ignition Coil 2, T8C Ignition Coil 3, and T8D Ignition Coil 4 |
| 17 | IGN/COIL/EVEN Fuse | F17UA Fuse | 15 A | K20 Engine Control Module |
| 18 | EMPTY | F18UA Fuse | 5 A | Not Used |
| 19 | EMPTY | F19UA Fuse | 10 A | Not Used |
| 20 | DC/DC TRANS Fuse | F20UA Fuse | 40 A | T19 Power Supply Transformer |
| 21 | L/GATE Fuse | F21UA | 30 A | K39 Liftgate Control Module |
| 22 | ABS Fuse | F22UA Fuse | 60 A | K17 Electronic Brake Control Module |
| 23 | WASH/PUMP Fuse | F23UA Fuse | 15 A | KR11 Windshield Washer Pump Relay, and KR6 Rear Window Washer Pump Relay |
| 24 | HDLP/WASH Fuse | F24UA Fuse | 25 A | KR2 Headlamp Washer Pump Relay |
| 25 | EMPTY | F25UA Fuse | - | Not Used |
| 26 | TRANS/OIL/PUMP | F26UA Fuse | 40 A | KR108 Transmission Hydraulics Oil Pump Relay |
| 27 | ABS Fuse | F27UA Fuse | 30 A | K17 Electronic Brake Control Module |
| 28 | EMPTY | F28UA Fuse | 30A | Not Used |
| 29 | RR/WDO/DEFOG Fuse | F29UA Fuse | 40 A | E18 Rear Defogger Grid |
| 30 | MIR/DEFOG Fuse | F30UA Fuse | 7.5 A | A9A Outside Rearview Mirror Glass - Driver, and A9B Outside Rearview Mirror Glass - Passenger |
| 31 | EMPTY | F31UA Fuse | - | Not Used |
| 32 | VAR/FUNC Fuse | F32UA Fuse | 7.5 A | K33 HVAC Control Module, K111 Fuel Pump Driver Control Module, KR80 Accessory Relay (KI6), P16 Instrument Cluster, P43 Collision Alert Indicators, T1 Accessory DC/AC Power Inverter Module (KI6), and T19 Power Supply Transformer |
| 33 | EMPTY | F33UA Fuse | - | Not Used |
| 34 | HORN Fuse | F34UA Fuse | 15 A | P12A Horn - High Note, and P12B Horn - Low Note |
| 35 | EMPTY | F35UA Fuse | - | Not Used |
| 36 | HI/BEAM/RT Fuse | F36UA Fuse | 10 A | M28R High Beam Solenoid Actuator - Right |
| 37 | HI/BEAM/LT Fuse | F37UA Fuse | 10 A | M28L High Beam Solenoid Actuator - Left |
| 38 | AHL Fuse | F38UA Fuse | 5 A | K28 Headlamp Leveling Control Module (T4F) |
| 39 | FOG/LMP/FRT Fuse | F39UA Fuse | 15 A | E29LF Fog Lamp - Left Front, and E29RF Fog Lamp - Right Front |
| 40 | TRANS/OIL/PUMP Fuse | F40UA Fuse | 5 A | Not Used |
| 41 | CD/ST/VNT/ESTAT_TCM Fuse | F41UA Fuse | 10 A | M73B Seat Blower Motor - Passenger Back (KU3), and M73D Seat Blower Motor - Passenger Cushion (KU3) |
| 42 | HDLP/POS Fuse | F42UA Fuse | 10 A | M3L Headlamp Horizontal Motor - Left (T4F), M3R Headlamp Horizontal Motor - Right (T4F), M29L Headlamp Leveling Actuator - Left (T4F), and M29R Headlamp Leveling Actuator - Right (T4F) |
| 43 | EMPTY | F43UA Fuse | 20 A | Not Used |
| 44 | ISRVM Fuse | F44UA Fuse | 10 A | A10 Inside Rearview Mirror, and B87 Rearview Camera (Without UVH) |
| 45 | EMPTY | F45UA Fuse | 15 A | Not Used |
| 46 | DR/SEAT/VENT Fuse | F46UA Fuse | 10 A | M73A Seat Blower Motor - Driver Back (KU1), and M73C Seat Blower Motor - Driver Cushion (KU1) |
| 47 | ECSCL Fuse | F47UA Fuse | 20 A | Not Used |
| 48 | RR/WPR Fuse | F48UA Fuse | 20 A | M45 Rear Wiper Motor, and KR7 Rear Wiper Relay |
| 49 | EMPTY | F49UA Fuse | - | Not Used |
| 50 | EMPTY | F50UA Fuse | - | Not Used |
| 51 | DRL LH Fuse | F51UA Fuse | 15 A | T7R Headlamp Ballast - Right (T4F) |
| 52 | ECM/TCM Fuse | F52UA Fuse | 7.5 A | K20 Engine Control Module, and Q8 Control Solenoid Valve Assembly |
| 53 | EMPTY | F53UA Fuse | - | Not Used |
| 54 | EMPTY | F54UA Fuse | - | Not Used |
| 55 | FRT/WPR Fuse | F55UA Fuse | 30 A | KR12B Windshield Wiper Relay, and KR12C Windshield Wiper Speed Control Relay |
| 56 | EMPTY | F56UA Fuse | - | Not Used |
| 57 | DRL/LT | F57UA Fuse | 15 A | T7L Headlamp Ballast - Left (T4F) |
| Relays | ||||
| K1 | START/STOP Relay | KR27 Starter Relay | - | M64 Starter Motor |
| K2 | A/C CLUTCH Relay | KR29 A/C Compressor Clutch Relay | - | Q2 A/C Compressor Clutch |
| K3 | ECM Relay | KR75 Engine Controls Ignition Relay | - | F3UA, F4UA, F5UA, F15UA, F16UA, F17UA Fuses, and KR29 A/C Compressor Clutch Relay |
| K4 | WPR Relay | KR12B Windshield Wiper Relay | - | KR12C Windshield Wiper Speed Control Relay |
| K5 | START/SOL Relay | KR27C Starter Pinion Solenoid Actuator Relay | - | M64 Starter Motor |
| K8 | TRANS/OIL/PUMP Relay | KR108 Transmission Hydraulics Oil Pump Relay | - | Not Used |
| K9 | WPR/SPD Relay | KR12C Windshield Wiper Speed Control Relay | - | M75 Windshield Wiper Motor |
| K10 | STARTER Relay | KR23A Fuel Pump Relay | - | Not Used |
| K11 | HDLP/WASH Relay | KR2 Headlamp Washer Pump Relay | - | Not Used |
| K12 | HI/BEAM Relay | KR48 Headlamp High Beam Relay | - | F36UA, and F37UA Fuses |
| K13 | DRL Relay | KR50 Headlamp Relay | - | F51UA, and F57UA Fuses |
| K14 | RUN/CRANK Relay | KR73 Ignition Main Relay | - | F32UA, F41UA, F42UA, F44UA, F46UA, F47UA, and F52UA Fuses |
| K15 | RR/WDO/MIR/DEFOG Relay | KR5 Rear Defogger Relay | - | F29UA, and F30UA Fuses |
| Important: Relays listed below are non-serviceable Printed Circuit Board (PCB) relays and are internal to the block | ||||
| K16 | HORN PCB Relay | KR3 Horn Relay | - | F34UA Fuse |
| K17 | SCR PCB Relay | - | - | Not Used |
| K18 | FOG/LMP/FRT PCB Relay | KR46 Front Fog Lamp Relay | - | F39UA Fuse |
| K19 | COOL/PMP PCB Relay | KR31 Coolant Pump Relay - Auxiliary | - | G36 Auxiliary Heater Coolant Pump |
| K20 | EMPTY | - | - | Not Used |
| K21 | WASH/PUMP/RR PCB Relay | KR6 Rear Window Washer Pump Relay | - | G19 Rear Window Washer Pump |
| K22 | WASH/PUMP/FT PCB Relay | KR11 Windshield Washer Pump Relay | - | G24 Windshield Washer Pump |
| K23 | WPR/RR PCB Relay | KR7 Rear Wiper Relay | - | M45 Rear Wiper Motor |
|
NOTE:
Items listed below are diagnostic test points for Wiper/Washer System PCB relays |
||||
| TP21 | - | TP21 | - | KR6 Rear Window Washer Pump Relay |
| TP22 | - | TP22 | - | KR11 Windshield Washer Pump Relay |
| TP23 | - | TP23 | - | KR7 Rear Wiper Relay |
|
NOTE:
Items listed below are diagnostic test points for HVAC PCB relays |
||||
| TP19-1 | - | TP19-1 | - | KR31 Coolant Pump Relay - Auxiliary |
| TP19-2 | - | TP19-2 | - | KR31 Coolant Pump Relay - Auxiliary |