X50A Fuse Block - Underhood Top View (KL9)
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
X50A FUSE BLOCK - UNDERHOOD FUSE AND RELAY IDENTIFICATION LEGEND (KL9)
| No. | Device Label Name | Device Assigned Name | Rating | Description |
|---|---|---|---|---|
| Fuses | ||||
| 1 | EMPTY | F1UA | - | - |
| 2 | EMPTY | F2UA | - | - |
| 3 | MSB PASS | F3UA | 30A | M101R Seat Belt Retractor Motor Module - Right (AX7) |
| 4 | EMPTY | F4UA | - | - |
| 5 | EMPTY | F5UA | - | - |
| 6 | DRVR PWR SEAT | F6UA | 30A | K40D Seat Memory Control Module - Driver (Coupe or A45), S64D Seat Adjuster Switch - Driver (Sedan with AQ9 except A45) |
| 11 | EMPTY | F11UA | - | - |
| 13 | PASS PWR SEAT | F13UA | 30A | S64P Seat Adjuster Switch - Passenger |
| 14 | EMPTY | F14UA | - | - |
| 15 | PEPS (ATS/WPR FRT (CTS) | F15UA | 30A | - |
| 16 | EMPTY | F16UA | - | - |
| 17 | HDLP WASH | F17UA | 25A | G16 Headlamp Washer Pump (CE4) |
| 18 | EMPTY | F18UA | - | - |
| 19 | ABS PUMP | F19UA | 60A | K17 Electronic Brake Control Module |
| 20 | ABS VLV | F20UA | 30A | K17 Electronic Brake Control Module |
| 21 | EMPTY | F21UA | - | - |
| 22 | MSB DRVR | F22UA | 30A | M101L Seat Belt Retractor Motor Module - Left (AX7) |
| 27 | SPARE/HTD SEAT2 | F27UA | 15A | K29F Seat Heating Control Module - Front (KA1) |
| 28 | SPARE/REV LK OUT | F28UA | 10A | - |
| 29 | AFS AHL/PED PROT | F29UA | 10A | K26 Headlamp Control Module (T4F), K42 Pedestrian Impact Detection Control Module (B3T) |
| 30 | EMPTY | F30UA | - | - |
| 31 | PASS WNDW SW | F31UA | 10A | S79P Window Switch - Passenger (A45) |
| 32 | EMPTY | F32UA | - | - |
| 33 | S/ROOF | F33UA | 30A | M69 Sunroof Motor (CF5) |
| 34 | WPR FRT | F34UA | 30A | KR12B Windshield Wiper Relay, KR12C Windshield Wiper Speed Control Relay |
| *35 | STR COL LK | F35UA | 5A | K60 Steering Column Lock Module (ULS) |
| 36 | RBBEC IGN | F36UA | 20A | F25RA, F28RA, K29F Seat Heating Control Module - Front (KA1) |
| 37 | SPARE/MIL IGN | F37UA | 5A | P16 Instrument Cluster |
| 38 | SPARE PT FUSE | F38UA | 10A | - |
| 39 | O2 SNSR EMIS | F39UA | 10A | B52B Heated Oxygen Sensor 2 (LTG), B52D Heated Oxygen Sensor - Bank 1 Sensor 2 (LGX), B52F Heated Oxygen Sensor - Bank 2 Sensor 2 (LGX), B75C Multifunction Intake Air Sensor, B280 Automatic Transmission Accumulator Solenoid Valve (M5N) |
| 40 | IGN COIL INJ | F40UA | 15A | B52A Heated Oxygen Sensor 1 (LTG), B52C Heated Oxygen Sensor - Bank 1 Sensor 1 (LGX), B52E Heated Oxygen Sensor - Bank 2 Sensor 1 (LGX), K20 Engine Control Module, Q12 Evaporative Emission Purge Solenoid Valve, Q40 Turbocharger Bypass Solenoid Valve (LTG), Q42 Turbocharger Wastegate Solenoid Valve (LTG), Q44 Engine Oil Pressure Control Solenoid Valve, Q83A Valve Lifter Oil Solenoid Valve - Bank 1 (LGX), Q83B Valve Lifter Oil Solenoid Valve - Bank 2 (LGX), Q84A Camshaft Position Actuator Park Lock Solenoid Valve - Bank 1 Intake (LGX), Q84B Camshaft Position Actuator Park Lock Solenoid Valve - Bank 2 Intake (LGX), T8B Ignition Coil 2 (LGX), T8D Ignition Coil 4 (LGX), T8F Ignition Coil 6 (LGX) |
| 41 | SPARE/IGN COIL INJ | F41UA | 15A | K20 Engine Control Module, T8A Ignition Coil 1, T8B Ignition Coil 2 (LTG), T8C Ignition Coil 3, T8D Ignition Coil 4 (LTG), T8E Ignition Coil 5 (LGX) |
| 42 | ECM | F42UA | 25A | K20 Engine Control Module |
| 43 | EMPTY | F43UA | - | - |
| 45 | WASH | F45UA | 20A | KR11 Windshield Washer Pump Relay |
| 46 | EMPTY | F46UA | - | - |
| 47 | FRT WASH RLY | F47UA | - | - |
| 48 | IP BODY IGN | F48UA | 10A | A10 Inside Rearview Mirror (DD8), K69 Transfer Case Control Module (F46), P14 Passenger Air Bag Disabled Indicator (T2J), P43 Collision Alert Indicators (UEU without UV6), S42 Headlamp Leveling Switch (TR6) |
| 49 | FSCM IGN | F49UA | 10A | K38 Chassis Control Module |
| 50 | HTD STR WHL | F50UA | 15A | F25DA (UVD), Q80L Engine Mount Solenoid Valve - Left (LTG), Q80R Engine Mount Solenoid Valve - Right (LTG) |
| 51 | ECM IGN | F51UA | 15A | K20 Engine Control Module |
| 52 | TCM IGN | F52UA | 15A | K71 Transmission Control Module (M5N) |
| 53 | COOL PUMP | F53UA | 10A | G17 Heater Coolant Pump |
| 55 | EMPTY | F55UA | - | - |
| 56 | TCM/SPARE | F56UA | 15A | - |
| 64 | AHL | F64UA | 10A | M3L Headlamp Horizontal Motor - Left (T4F), M3R Headlamp Horizontal Motor - Right (T4F), M29L Headlamp Leveling Actuator - Left (TR7), M29R Headlamp Leveling Actuator - Right (TR7) |
| 65 | LT HID | F65UA | 15A | T7L Headlamp Ballast - Left (T4F) |
| 66 | RT HID | F66UA | 15A | T7R Headlamp Ballast - Right (T4F) |
| 67 | HDLP HI LT/RT | F67UA | 10A | M28L High Beam Solenoid Actuator - Left, M28R High Beam Solenoid Actuator - Right |
| 68 | AERO SHUTTER | F68UA | 10A | M29L Headlamp Leveling Actuator - Left (TR6), M29R Headlamp Leveling Actuator - Right (TR6), M96 Active Grille Air Shutter Actuator (XFE) |
| 69 | HORN | F69UA | 15A | P13 Horn Assembly |
| 71 | COOL FAN | F71UA | 60A | - |
| 72 | STRTR2 | F72UA | 30A | KR27C Starter Pinion Solenoid Actuator Relay |
| *73 | BRK VAC PUMP | F73UA | 20A | - |
| 74 | STRTR | F74UA | 40A | KR27 Starter Relay |
| 75 | A/C CLTCH | F75UA | 10A | KR29 A/C Compressor Clutch Relay |
| 76 | EMPTY | F76UA | - | - |
| Relays | ||||
| 8 | HDLP WASH RLY | KR2 Headlamp Washer Pump Relay | - | F17UA |
| 9 | EMPTY | - | - | - |
| 12 | EMPTY | - | - | - |
| 23 | WPR CNTRL RLY | KR12B Windshield Wiper Relay | - | KR12C Windshield Wiper Speed Control Relay |
| 24 | WPR SPD RLY | KR12C Windshield Wiper Speed Control Relay | - | M75 Windshield Wiper Motor |
| 25 | ECM RLY | KR75 Engine Controls Ignition Relay | - | F38UA, F39UA, F40UA, F41UA, F42UA, KR31 Coolant Pump Relay - Auxiliary, KR29 A/C Compressor Clutch Relay |
| 26 | EMPTY | - | - | - |
| 44 | EMPTY | - | - | - |
| 54 | COOL PUMP RLY | KR31 Coolant Pump Relay - Auxiliary | - | F53UA |
| 57 | HDLP LO RLY | KR49 Headlamp Low Beam Relay | - | F65UA, F66UA |
| 58 | HDLP HI RLY | KR48 Headlamp High Beam Relay | - | F67UA |
| 59 | RUN/CRNK RLY | KR73 Ignition Main Relay | - | F35UA, F36UA, F37UA, F48UA, F49UA, F50UA, F51UA, F52UA, F68UA |
| *60 | STRTR2 RLY | KR27C Starter Pinion Solenoid Actuator Relay | - | F72UA |
| 61 | VAC PUMP RLY | - | - | - |
| 62 | STRTR RLY | KR27 Starter Relay | - | F74UA |
| 63 | A/C CNTRL RLY | KR29 A/C Compressor Clutch Relay | - | Q2 A/C Compressor Clutch |
|
NOTE:
Relays listed below are non-serviceable Printed Circuit Board (PCB) relays and are internal to the block. |
||||
| 7 | EMPTY | - | - | - |
| 10 | EMPTY | - | - | - |
| 46 | EMPTY | - | - | - |
| 47 | FRT WASH RLY | KR11 Windshield Washer Pump Relay | - | G24 Windshield Washer Pump |
| 70 | HORN RLY | KR3 Horn Relay | - | F69UA |
|
NOTE:
Items listed below are diagnostic test points for PCB relays |
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| CP1 | - | TP1 | - | Not Used |
|
NOTE:
Items listed below are diagnostic test points for Wiper/Washer System |
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| CP2 | - | TP2 | - | KR11 Windshield Washer Pump Relay |
|
NOTE:
Items listed below are diagnostic test points for Ground Distribution |
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| CP3 | - | TP3 | - | Ground Bus |