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In this article, you will find information about the fuses of the Cadillac CT6 (models 2016, 2017, and 2018), including diagrams of the fuse boxes, a list of fuses and relays, their designation, and the location of the fuse blocks within the vehicle.
Checking and Replacing Fuses in Cadillac CT6
The vehicle has fuses and circuit breakers to protect against an electrical system overload. When the current electrical load is too heavy, the circuit breaker opens and closes, protecting the circuit until the current load returns to normal or the problem is fixed. This greatly reduces the chance of circuit overload and fire caused by electrical problems. Fuses and circuit breakers protect power devices in the vehicle. Replace a bad fuse with a new one of the identical size and rating.
Caution!
Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component.
Location of Fuse Boxes
Engine Compartment Fuse Block:
The underhood fuse block is on the driver side of the engine compartment. Lift the fuse block cover to access the fuses.
Instrument Panel Fuse Block:
The instrument panel fuse block is behind the driver side instrument panel storage compartment. The storage compartment has a press to open latch. To access the fuses, open the compartment by pressing and releasing near the top center square. Apply pressure to the two retaining tabs on the sides of the compartment, until the two retaining tabs clear the sides of the instrument panel. Allow the compartment to move downward, and out of the way.
Rear Compartment Fuse Block:
The rear compartment fuse block is behind a cover on the passenger side of the rear compartment. The vehicle may not be equipped with all of the fuses, relays, and features shown.
- An electrical overload may cause the lamps to go on and off, or in some cases to remain off. Have the headlamp wiring checked right away if the lamps go on and off or remain off.
- If the wiper motor overheats due to heavy snow or ice, the windshield wipers will stop.
Fuse Box Diagrams
2016
Engine Compartment Fuse Block
| № | Usage |
|---|---|
| 1 | Traction power inverter 2 |
| 2 | Power coolant pump |
| 3 | - |
| 4 | Traction power inverter 1 |
| 5 | Transmission / lgnition |
| 6 | - |
| 7 | Starter 2 |
| 8 | Starter 1 |
| 9 | Horn |
| 10 | - |
| 11 | Right LED |
| 12 | Left LED |
| 13 | High-beam headlamps |
| 18 | Right cornering LED |
| 21 | A/C clutch |
| 22 | - |
| 23 | Coolant heater control module |
| 24 | Coolant pump |
| 26 | HI fuel |
| 27 | Steering column lock |
| 28 | Rear heated seats |
| 29 | Front heated seats |
| 30 | - |
| 31 | LED LGT BAT |
| 32 | A/C control module |
| 33 | AIR solenoid |
| 34 | - |
| 35 | Engine control module |
| 36 | Engine control module 2 |
| 37 | Coolant pump / lgnition coils - odd |
| 38 | Ignition coils - even / Non walk 2 |
| 39 | Non walk |
| 40 | Instrument cluster |
| 41 | - |
| 42 | Fuel pump power module |
| 43 | Instrument panel body / Ignition |
| 44 | Aerosh utter |
| 45 | Washer |
| 46 | Front sensor |
| 47 | Left cornering LED |
| 54 | - |
| 55 | - |
| 56 | Air pump |
| 57 | - |
| 58 | Instrument panel electronic center |
| 59 | - |
| 60 | ABS pump |
| 61 | Front wiper |
| 62 | Headlamp leveling |
| 63 | Electric brake booster module |
| 64 | - |
| 65 | - |
| 66 | Transfer case control module |
| 67 | Electric brake booster |
| 68 | Rear seat entertainment display |
| 69 | - |
| 70 | - |
| 71 | ABS valve |
| 72 | - |
| 73 | - |
| 14 | A/C control |
| 15 | Starter 2 |
| 16 | Starter 1 |
| 17 | Run/Crank |
| 19 | Low-beam headlamps |
| 20 | High-beam headlamps |
| 25 | Coolant pump |
| 48 | AIR solenoid |
| 49 | Air pump |
| 50 | Engine control module |
| 51 | Wiper speed |
| 52 | Wiper control |
| 53 | Headlamp control |
Instrument Panel Fuse Block
| № | Usage |
|---|---|
| F1 | Power outlet |
| F2 | Visor |
| F3 | Front blower |
| F4 | Body control module 8 |
| F5 | Power steering column |
| F6 | Column lock |
| F7 | Glove box door |
| F8 | Front heated seat module |
| F9 | Sensing and diagnostic module |
| F10 | Body control module 4 |
| F11 | Body control module 3 |
| F12 | Data link connector |
| F13 | - |
| F14 | - |
| F15 | Rear vision camera |
| F16 | Display |
| F17 | HVAC control |
| F18 | OnStar |
| F19 | - |
| F20 | Lane departure warning |
| F21 | - |
| F22 | INFO 2 |
| F23 | Central gateway module |
| F24 | INFO 1 |
| F25 | Video processing module |
| F26 | Steering wheel controls |
| F27 | USB charge port |
| F28 | Wireless charger |
| F29 | - |
| F30 | Speaker |
Rear Compartment Fuse Block
| № | Usage |
|---|---|
| F01 | UCAP |
| F02 | Trunk power outlet |
| F03 | Driver window motor |
| F04 | - |
| F05 | Canister vent |
| F06 | Right rear memory seat |
| F07 | Body control module 7 |
| F08 | Driver seat adjustment switch |
| F09 | Passive entry / Passive start |
| F10 | Rear subwoofer amplifier |
| F11 | Driver memory seat module |
| F12 | - |
| F13 | - |
| F14 | Right rear seat |
| F15 | Left front subwoofer |
| F16 | Right front seat |
| F17 | Rear heated seat |
| F18 | Regulated voltage control battery |
| F19 | Door mirror switch |
| F20 | - |
| F21 | Vehicle integration control module |
| F22 | - |
| F23 | Rear closure |
| F24 | - |
| F25 | Left front seat belt |
| F26 | Rear defogger |
| F27 | Right front subwoofer |
| F28 | Amplifier |
| F29 | Sunroof |
| F30 | Body control module 2 |
| F31 | Body control module 6 |
| F32 | Exterior heated mirrors |
| F33 | Right window |
| F34 | Power trunk module |
| F35 | On-board charging module |
| F36 | Alarm siren module |
| F37 | AC power |
| F38 | Rear blower |
| F39 | Fuel pump power module |
| F40 | - |
| F41 | Rear seat accessory power outlet |
| F42 | Left rear memory seat |
| F43 | - |
| F44 | Rear closure |
| F45 | Radio |
| F46 | External object calculating / Side blind zone alert / Radar short range sensor |
| F47 | - |
| F48 | Right front seat |
| F49 | Memory bolster module |
| F50 | Body control module 1 |
| F51 | Transmission control module |
| F52 | Parking assist |
| F53 | Ventilated seats |
| F54 | Headliner |
| F55 | Front memory seat module |
| F56 | Evaporative emissions leak check module |
| F57 | Voltage current temperature module |
| F58 | - |
| F59 | Engine control module battery |
| F60 | Right front seat belt |
| F61 | Parking lamps |
| F62 | - |
| F63 | - |
| F64 | Engine control module ignition |
| F65 | Rear window sunshade |
| F66 | Rear vision camera |
| F67 | Run/Crank / MISC |
| F68 | Damping control module |
| F69 | Television tuner module |
| F70 | - |
| F71 | - |
| F72 | - |
| F73 | - |
| F74 | - |
| F75 | - |
| R1 | Rear seat accessory power outlet |
| R2 | Fuel pump |
| R3 | Run/Crank |
2017
Engine Compartment Fuse Block
| № | Usage |
|---|---|
| 1 | Traction power inverter 2 |
| 2 | Power coolant pump |
| 3 | - |
| 4 | Traction power inverter 1 |
| 5 | Transmission / Ignition |
| 6 | - |
| 7 | Starter 2 |
| 8 | Starter 1 |
| 9 | Horn |
| 10 | - |
| 11 | Right LED |
| 12 | Left LED |
| 13 | Left and right high-beam headlamps |
| 14 | A/C control relay |
| 15 | Starter 2 relay |
| 16 | Starter 1 relay |
| 17 | Run/Crank relay |
| 18 | Right cornering LED |
| 19 | Low-beam headlamp relay |
| 20 | High-beam headlamp relay |
| 21 | A/C clutch |
| 22 | - |
| 23 | Coolant heater control module |
| 24 | Coolant pump |
| 25 | Coolant pump relay |
| 26 | Hi fuel |
| 27 | Steering column lock |
| 28 | Rear heated seats |
| 29 | Front heated seats |
| 30 | - |
| 31 | LED LGT battery |
| 32 | A/C control module |
| 33 | AIR solenoid |
| 34 | - |
| 35 | Engine control module |
| 36 | Engine control module 2 |
| 37 | Coolant pump / Ignition coils - odd |
| 38 | Ignition coils - even / Non walk 2 |
| 39 | Non walk |
| 40 | Instrument cluster |
| 41 | - |
| 42 | Fuel pump power module |
| 43 | Instrument panel body / Ignition |
| 44 | Aeroshutter |
| 45 | Washer |
| 46 | Front sensor |
| 47 | Left cornering LED |
| 48 | AIR solenoid relay |
| 49 | Air pump relay |
| 50 | Engine control module relay |
| 51 | Wiper speed relay |
| 52 | Wiper control relay |
| 53 | Headlamp control relay |
| 54 | - |
| 55 | - |
| 56 | Air pump |
| 57 | - |
| 58 | Instrument panel electronic center |
| 59 | - |
| 60 | ABS pump |
| 61 | Front wiper |
| 62 | Headlamp leveling |
| 63 | Electric brake booster module |
| 64 | - |
| 65 | - |
| 66 | Transfer case control module |
| 67 | Electric brake booster |
| 68 | Rear seat entertainment display |
| 69 | RESS coolant pump |
| 70 | - |
| 71 | ABS valve |
| 72 | - |
| 73 | - |
Instrument Panel Fuse Block
| № | Usage |
|---|---|
| F1 | Power outlet |
| F2 | Visor |
| F3 | Front blower |
| F4 | Body control module 8 |
| F5 | Power steering column |
| F6 | Column lock |
| F7 | Glove box door |
| F8 | Front heated seat module |
| F9 | Sensing and diagnostic module |
| F10 | Body control module 4 |
| F11 | Body control module 3 |
| F12 | Data link connector |
| F13 | - |
| F14 | - |
| F15 | Rear vision camera |
| F16 | Display |
| F17 | HVAC control |
| F18 | OnStar |
| F19 | - |
| F20 | Lane departure warning |
| F21 | - |
| F22 | INFO 2 |
| F23 | Central gateway module |
| F24 | INFO 1 |
| F25 | Video processing module |
| F26 | Steering wheel controls |
| F27 | USB charge port |
| F28 | Wireless charger |
| F29 | - |
| F30 | Speaker |
Rear Compartment Fuse Block
| № | Usage |
|---|---|
| F01 | UCAP |
| F02 | Trunk power outlet |
| F03 | Driver window motor |
| F04 | - |
| F05 | Canister vent |
| F06 | Right rear memory seat |
| F07 | Body control module 7 |
| F08 | Driver seat adjustment switch |
| F09 | Passive entry / Passive start |
| F10 | Rear subwoofer amplifier |
| F11 | Driver memory seat module |
| F12 | - |
| F13 | - |
| F14 | Right rear seat |
| F15 | Left front subwoofer |
| F16 | Right front seat |
| F17 | Rear heated seat |
| F18 | Regulated voltage control battery |
| F19 | Door mirror switch |
| F20 | - |
| F21 | Vehicle integration control module |
| F22 | - |
| F23 | Rear closure |
| F24 | - |
| F25 | Left front safety belt |
| F26 | Rear defogger |
| F27 | Right front subwoofer |
| F28 | Amplifier |
| F29 | Sunroof |
| F30 | Body control module 2 |
| F31 | Body control module 6 |
| F32 | Exterior heated mirrors |
| F33 | Right window |
| F34 | Power trunk module |
| F35 | On-board charging module |
| F36 | Alarm siren module |
| F37 | AC power |
| F38 | Rear blower |
| F39 | Fuel pump power module |
| F40 | - |
| F41 | Rear seat accessory power outlet |
| F42 | Left rear memory seat |
| F43 | - |
| F44 | Rear closure |
| F45 | Radio |
| F46 | External object calculating / Side blind zone alert / Radar short range sensor |
| F47 | - |
| F48 | Right front seat |
| F49 | Memory bolster module |
| F50 | Body control module 1 |
| F51 | Transmission control module |
| F52 | Parking assist |
| F53 | Ventilated seats |
| F54 | Headliner |
| F55 | Front memory seat module |
| F56 | Evaporative emissions leak check module |
| F57 | Voltage current temperature module |
| F58 | - |
| F59 | Engine control module battery |
| F60 | Right front safety belt |
| F61 | Parking lamps |
| F62 | - |
| F63 | - |
| F64 | Engine control module ignition |
| F65 | Rear window sunshade |
| F66 | Rear vision camera |
| F67 | Run/Crank / MISC |
| F68 | Damping control module |
| F69 | Television tuner module |
| F70 | - |
| F71 | - |
| F72 | - |
| F73 | - |
| F74 | - |
| F75 | - |
| R1 | Rear seat accessory power outlet |
| R2 | Fuel pump |
| R3 | Run/Crank |
2018
Engine Compartment Fuse Block
| № | Usage |
|---|---|
| 1 | - |
| 2 | Power coolant pump |
| 3 | - |
| 4 | Traction power inverter 1 |
| 5 | Transmission / Ignition |
| 6 | - |
| 7 | Starter motor |
| 8 | Starter pinion |
| 9 | Horn |
| 10 | - |
| 11 | - |
| 12 | - |
| 13 | High-beam headlamps |
| 14 | Air conditioning control relay |
| 15 | Starter motor relay |
| 16 | Starter pinion relay |
| 17 | Run/Crank relay |
| 18 | Right cornering LED |
| 19 | - |
| 20 | High-beam headlamp relay |
| 21 | Air conditioning clutch |
| 22 | - |
| 23 | Coolant heater control module |
| 24 | Cabin coolant pump |
| 25 | Cabin coolant pump relay |
| 26 | Hi fuel |
| 27 | Steering column lock |
| 28 | Rear heated seats |
| 29 | Front heated seats |
| 30 | - |
| 31 | HDLP / DRL / Right headlamp |
| 32 | Air conditioning control module |
| 33 | - |
| 34 | - |
| 35 | Engine control module IGN2 |
| 36 | Engine control module IGN1 |
| 37 | Coolant pump / Ignition coils-odd |
| 38 | Ignition coils-even / Non walk 2 |
| 39 | Non walk |
| 40 | Instrument cluster |
| 41 | - |
| 42 | Fuel pump power module |
| 43 | Instrument panel body / Ignition |
| 44 | Aeroshutter |
| 45 | Washer |
| 46 | Front sensor |
| 47 | Left cornering LED |
| 48 | - |
| 49 | - |
| 50 | Engine control module relay |
| 51 | Wiper speed relay |
| 52 | Wiper control relay |
| 53 | Headlamp control relay |
| 54 | - |
| 55 | - |
| 56 | - |
| 57 | - |
| 58 | - |
| 59 | - |
| 60 | Antilock brake system pump |
| 61 | Front wiper |
| 62 | Headlamp leveling |
| 63 | Electric brake booster module |
| 64 | - |
| 65 | - |
| 66 | Transfer case control module |
| 67 | Electric brake booster |
| 68 | Rear seat entertainment display |
| 69 | Rechargeable energy storage system coolant pump |
| 70 | - |
| 71 | Anitlock brake system valve |
| 72 | - |
| 73 | - |
Instrument Panel Fuse Block
| № | Usage |
|---|---|
| F1 | Power outlet |
| F2 | Visor |
| F3 | Front blower |
| F4 | Body control module 8 |
| F5 | Power steering column |
| F6 | Column lock |
| F7 | Glove box door |
| F8 | Front heated seat module |
| F9 | Sensing and diagnostic module |
| F10 | Body control module 4 |
| F11 | Body control module 3 |
| F12 | Data link connector |
| F13 | - |
| F14 | - |
| F15 | Rear vision camera |
| F16 | Display |
| F17 | Heating, ventilation, and air conditioning control |
| F18 | OnStar |
| F19 | - |
| F20 | - |
| F21 | Traction power inverter 2 |
| F22 | Infotainment 2 |
| F23 | Central gateway module |
| F24 | Infotainment 1 |
| F25 | Video processing module |
| F26 | Steering wheel controls |
| F27 | USB charge port |
| F28 | Wireless charger |
| F29 | - |
| F30 | Speaker |
Rear Compartment Fuse Block
| № | Usage |
|---|---|
| F01 | UCAP |
| F02 | Trunk power outlet |
| F03 | Left window |
| F04 | - |
| F05 | Canister vent |
| F06 | Right rear memory seat |
| F07 | Body control module 7 |
| F08 | Seat adjustment switch |
| F09 | Passive entry / passive start |
| F10 | Rear subwoofer |
| F11 | Left front memory seat module |
| F12 | - |
| F13 | - |
| F14 | Rear seat memory / heated |
| F15 | Left front subwoofer |
| F16 | Right front memory seat |
| F17 | Rear heated seat |
| F18 | Regulated voltage control battery |
| F19 | Driver passenger door window / mirror / driver seat adjustment |
| F20 | - |
| F21 | Vehicle integration control module |
| F22 | - |
| F23 | Rear closure latch |
| F24 | - |
| F25 | Left front motorized seat belt pretensioner |
| F26 | Rear defogger |
| F27 | Right front subwoofer |
| F28 | Amplifier |
| F29 | Sunroof |
| F30 | Body control module 2 |
| F31 | Body control module 6 |
| F32 | Exterior heated mirrors |
| F33 | Right mirror |
| F34 | Power trunk module |
| F35 | On-board charging module |
| F36 | Alarm siren module |
| F37 | AC DC inverter |
| F38 | Rear blower |
| F39 | Fuel pump power |
| F40 | - |
| F41 | Rear seat power outlet |
| F42 | Left rear memory seat |
| F43 | - |
| F44 | Rear closure release switch / lift gate module |
| F45 | Auxiliary audio / video/radio |
| F46 | External object calculating module / side blind zone alert / rear center short range radar sensor / long range radar sensors |
| F47 | - |
| F48 | Right front seat |
| F49 | Memory bolster module |
| F50 | Body control module 1 |
| F51 | Transmission control module |
| F52 | Parking assist |
| F53 | Ventilated seats |
| F54 | Headliner |
| F55 | Front memory seat module |
| F56 | Evaporative emissions leak check module |
| F57 | Voltage current temperature module |
| F58 | - |
| F59 | Engine control module battery |
| F60 | Right front motorized seat belt pretensioner |
| F61 | Parking lamps |
| F62 | - |
| F63 | - |
| F64 | Engine control module ignition |
| F65 | Rear window sunshade |
| F66 | Rear vision camera / interior rear view mirror |
| F67 | Run/crank misc / DC DC converter / air quality sensor |
| F68 | Damping control module |
| F69 | Television tuner module |
| F70 | - |
| F71 | - |
| F72 | - |
| F73 | - |
| F74 | - |
| F75 | - |