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X50A Fuse Block - Underhood Top View

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: X50A Fuse Block - Underhood Top View
GM4293761Courtesy of GENERAL MOTORS COMPANY
X50A FUSE BLOCK - UNDERHOOD FUSE AND RELAY IDENTIFICATION LEGEND

No. Device Label Name Device Assigned Name Rating Description
Fuses 
F1 ABS F1UA Fuse 60A
  • K17 Electronic Brake Control Module
F2 STRTR F2UA Fuse 25A
  • KR27 Starter Relay
F3 DC DC TRANS 1 F3UA Fuse 40A
  • T19 Power Supply Transformer (KL9)
F4 EMPTY F4UA Fuse -
  • Not Used
F5 EMPTY F5UA Fuse -
  • Not Used
F6 EMPTY F6UA Fuse -
  • Not Used
F7 DC DC TRANS 2 F7UA Fuse 40A
  • T19 Power Supply Transformer (KL9)
F8 STRTR 3 F8UA Fuse 40A
  • KR27C Starter Pinion Solenoid Actuator Relay (LCV)
F9 EMPTY F9UA Fuse -
  • Not Used
F10 EMPTY F10UA Fuse -
  • Not Used
F11 EMPTY F11UA Fuse -
  • Not Used
F12 WPR FRT F12UA Fuse 30A
  • KR12B Windshield Wiper Relay
  • KR12C Windshield Wiper Speed Control Relay
F13 STRTR 2 F13UA Fuse 30A
  • KR27 Starter Relay
F14 LED/AHL F14UA Fuse 15A
  • E13LA Headlamp Assembly - Left
  • E13RA Headlamp Assembly - Right
F15 REAR/WPR 1 F15UA Fuse 20A
  • KR7 Rear Wiper Relay
F16 EMPTY F16UA Fuse -
  • Not Used
F17 EMPTY F17UA Fuse -
  • Not Used
F18 AHL F18UA Fuse -
  • Not Used
F19 EMPTY F19UA Fuse -
  • Not Used
F20 EMPTY F20UA Fuse -
  • Not Used
F21 EMPTY F21UA Fuse -
  • Not Used
F22 EBCM F22UA Fuse 30A
  • K17 Electronic Brake Control Module
F23 PRK TRLR LAMP F23UA Fuse 15A
  • X88 Trailer Connector (V92)
F24 TRLR ST/TRN RT F24UA Fuse 10A
  • X88 Trailer Connector (V92)
F25 ESCL F25UA Fuse -
  • Not Used
F26 EMPTY F26UA Fuse -
  • Not Used
F27 TRLR ST/TRN LT F27UA Fuse 10A
  • X88 Trailer Connector (V92)
F28 EMPTY F28UA Fuse -
  • Not Used
F29 EMPTY F29UA Fuse -
  • Not Used
F30 WASH PUMP F30UA Fuse 20A
  • KR11 Windshield Washer Pump Relay
F31 LO BEAM RT F31UA Fuse 20A
  • E13LA Headlamp Assembly - Left (T4F)
F32 LO BEAM LT F32UA Fuse 20A
  • E13RA Headlamp Assembly - Right (T4F)
F33 FOG LMP FRT F33UA Fuse 15A
  • E29LF Fog Lamp - Left Front (T3Y)
  • E29RF Fog Lamp - Right Front (T3Y)
F34 HORN F34UA Fuse 20A
  • P12L Horn - Left
  • P12R Horn - Right
F35 EMPTY F35UA Fuse -
  • Not Used
F36 HI BEAM LT F36UA Fuse 10A
  • E13LA Headlamp Assembly - Left
  • M28L High Beam Solenoid Actuator - Left
F37 HI BEAM RT F37UA Fuse 10A
  • E13RA Headlamp Assembly - Right
  • M28R High Beam Solenoid Actuator - Right
F38 HDLP F38UA Fuse 15A
  • E4E Headlamp - Left High Beam
F39 TCM BATT 1 F39UA Fuse 20A
  • K71 Transmission Control Module (M2D)
  • Q8 Control Solenoid Valve Assembly (M2D)
F40 LRBEC IGN F40UA Fuse 20A
  • F17RA
  • F19RA Fuses
  • B87 Rearview Camera
  • T19 Power Supply Transformer (KL9)
  • X53A Fuse Block - Rear Body
F41 IPC F41UA Fuse 5A
  • P16 Instrument Cluster
F42 HVAC F42UA Fuse 10A
  • A34 HVAC Controls - Auxiliary (C69)
  • K33 HVAC Control Module
F43 HUD F43UA Fuse 5A
  • P43 Collision Alert Indicators (UEU)
F44 EMPTY F44UA Fuse -
  • Not Used
F45 EMPTY F45UA Fuse -
  • Not Used
F46 EMPTY F46UA Fuse -
  • Not Used
F47 EMPTY F47UA Fuse -
  • Not Used
F48 REAR/WPR 2 F48UA Fuse 20A
  • M45 Rear Wiper Motor
F49 ISRVM/TRLR F49UA Fuse 15A
  • A10 Inside Rearview Mirror (DD8)
F50 FSCM F50UA Fuse 10A
  • K111 Fuel Pump Driver Control Module
F51 HTD WHL F51UA Fuse 7.5A
  • K32 Steering Wheel Heating Control Module
  • X85 Steering Wheel Air Bag Coil
F52 A/C CLTCH F52UA Fuse 10A
  • KR29 A/C Compressor Clutch Relay
F53 TRCM F53UA Fuse -
  • Not Used
F54 ENG/COOL/PMP F54UA Fuse 15A
  • G36 Auxiliary Heater Coolant Pump (KL9)
F55 EMPTY F55UA Fuse -
  • Not Used
F56 EMPTY F56UA Fuse -
  • Not Used
F57 ECM IGN F57UA Fuse 15A
  • K20 Engine Control Module
F58 TCM IGN F58UA Fuse 20A
  • Q8 Control Solenoid Valve Assembly
  • K71 Transmission Control Module
F59 ECM BATT F59UA Fuse 10A
  • K20 Engine Control Module
F60 TCM BATT 2 F60UA Fuse 20A
  • Q8 Control Solenoid Valve Assembly (M7U/M7W)
  • K71 Transmission Control Module (M7U/M7W)
F61 O2SNSR/AERO SH F61UA Fuse 15A
  • B52B Heated Oxygen Sensor 2 (LCV)
  • 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 (LCV)
  • K20 Engine Control Module
  • M60A Active Grille Air Shutter 1 Motor Module (WMI)
  • M60B Active Grille Air Shutter 2 Motor Module (WMI)
F62 ECM ODD F62UA Fuse 15A
  • K20 Engine Control Module
  • T8A Ignition Coil 1
  • T8B Ignition Coil 2 (LCV)
  • T8C Ignition Coil 3
  • T8D Ignition Coil 4 (LCV)
  • T8E Ignition Coil 5 (LGX)
F63 MAF/O2 SNSR F63UA Fuse 15A
  • B52A Heated Oxygen Sensor 1 (LCV)
  • B52C Heated Oxygen Sensor - Bank 1 Sensor 1 (LGX)
  • B52E Heated Oxygen Sensor - Bank 1 Sensor 2 (LGX)
  • Q12 Evaporative Emission Purge Solenoid Valve
  • 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)
F64 ECM EVEN F64UA Fuse 15A
  • K20 Engine Control Module (LGX)
  • T8B Ignition Coil 2 (LGX)
  • T8D Ignition Coil 4 (LGX)
  • T8E Ignition Coil 5 (LGX)
F65 ECM PWR/TRN 1 F65UA Fuse 15A
  • K20 Engine Control Module
F66 ECM PWR/TRN 2 F66UA Fuse 25A
  • K20 Engine Control Module
F67 PWR/TRN TRCM F67UA Fuse 20A
  • Not Used
F68 SPARE F68UA Fuse 5A
  • Not Used
F69 SPARE F69UA Fuse 7.5A
  • Not Used
F70 SPARE F70UA Fuse 10A
  • Not Used
F71 SPARE F71UA Fuse 15A
  • Not Used
F72 SPARE F72UA Fuse 20A
  • Not Used
F73 SPARE F73UA Fuse 25A
  • Not Used
F74 SPARE F74UA Fuse 30A
  • Not Used
F75 SPARE F75UA Fuse 2A
  • Not Used
F76 SPARE F76UA Fuse 15A
  • Not Used
F77 SPARE F77UA Fuse 30A
  • Not Used
Relays 
K1 STRTR 1 RLY KR27 Starter Relay -
  • M64 Starter Motor (LCV)
K2 RUN/CRNK RLY KR73 Ignition Main Relay -
  • ESCL/F25UA
  • HDLP/F38UA
  • LRBEC IGN/F40UA
  • IPC/F41UA
  • HVAC/F42UA
  • HUD/F43UA
  • ISRVM/TRLR/F49UA
  • FSCM/F50UA
  • HTD WHL/F51UA
  • ECM IGN/F57UA
  • TCM IGN/F58UA
  • KR7 Rear Wiper Relay
K3 STRTR 3 RLY KR27C Starter Pinion Solenoid Actuator Relay -
  • M64 Starter Motor (LCV)
K4 LED/AHL RLY KR50 Headlamp Relay -
  • LED/AHL/F14UA
K5 EMPTY - -
  • Not Used
K6 COOL/PMP RLY KR31 Coolant Pump Relay - Auxiliary -
  • ENG/COOL/PMP/F54UA
K7 ECM RLY KR75 Engine Controls Ignition Relay -
  • O2SNSR/F61UA
  • ECM ODD/F62UA
  • MAF/O2 SENSR/F63UA
  • ECM EVEN/F64UA
  • ECM PWR/TRN 1/F65UA
  • ECM PWR/TRN 2/F66UA
  • PWR/TRN TRCM/F67UA
  • KR29 A/C Compressor Clutch Relay
  • KR31 Coolant Pump Relay - Auxiliary
K8 A/C RLY KR29 A/C Compressor Clutch Relay -
  • Q2 A/C Compressor Clutch
K9 EMPTY - -
  • Not Used
K10 STRTR 2 RLY KR27 Starter Relay -
  • M64 Starter Motor (LGX)
Important: Relays listed below are non-serviceable Printed Circuit Board (PCB) relays and are internal to the block 
- - KR3 Horn Relay -
  • HORN/F34UA
- - KR6 Rear Window Washer Pump Relay -
  • G19 Rear Window Washer Pump
- - KR7 Rear Wiper Relay -
  • M45 Rear Wiper Motor
- - KR11 Windshield Washer Pump Relay -
  • G24 Windshield Washer Pump
- - KR12B Windshield Wiper Relay -
  • M75 Windshield Wiper Motor
- - KR12C Windshield Wiper Speed Control Relay -
  • M75 Windshield Wiper Motor
- - KR46 Front Fog Lamp Relay -
  • FOG LMP FRT/F33UA
- - KR49 Headlamp Low Beam Relay -
  • LO BEAM RT/F31UA
  • LO BEAM LT/F32UA
- - KR63L Trailer Stop/Turn Signal Lamp Relay - Left -
  • TRLR ST/TRN LT/F27UA
- - KR63R Trailer Stop/Turn Signal Lamp Relay - Right -
  • TRLR ST/TRN RT/F24UA
- - KR125 Trailer Park Lamps Relay -
  • PRK TRLR LAMP/F23UA
- - KR169 High Beam Solenoid Actuator Relay -
  • HI BEAM LT/F36UA
  • HI BEAM RT/F37UA
- - KR172 Rear Wiper Ignition Relay -
  • REAR/WPR 2/F48UA
  • M45 Rear Wiper Motor
Important: Items listed below are Wiper and Washer system diagnostic test points. 
TP1 TEST POINT CKT 1350 TP1 -
  • KR7 Rear Wiper Relay
TP2 TEST POINT CKT 393 TP2 -
  • KR7 Rear Wiper Relay
TP3 TEST POINT CKT 228 TP3 -
  • KR11 Windshield Washer Pump Relay
TP4 TEST POINT CKT 392 TP4 -
  • KR6 Rear Window Washer Pump Relay
TP5 TEST POINT CKT 750 TP5 -
  • KR12B Windshield Wiper Relay
TP6 TEST POINT CKT 92 TP6 -
  • KR12C Windshield Wiper Speed Control Relay
TP7 TEST POINT CKT 95 TP7 -
  • KR12C Windshield Wiper Speed Control Relay
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