Cadillac CT6 Sedan (from 2016) – fuse box diagram
Year of production: 2016, 2017
Engine compartment fuse block
The underhood fuse block is on the driver side of the engine compartment.
| Number | 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 | Headlamp low-beam 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 BAT |
| 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 | — |
| 70 | — |
| 71 | ABS valve |
| 72 | — |
| 73 | — |
Instrument panel fuse block
The instrument panel fuse block is behind the driver side instrument panel storage compartment.
| Fuses | 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
The rear compartment fuse block is behind a cover on the passenger side of the rear compartment.
| Number | 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 amplifier |
| F16 | Right front seat |
| F17 | Rear heated seat |
| F18 | Battery/Regulated voltage control |
| F19 | Door mirror switch |
| F20 | — |
| F21 | Vehicle integration control module |
| F22 | — |
| F23 | Rear closure |
| F24 | — |
| F25 | Left motorized safety belt pretensioner |
| F26 | Rear defogger |
| F27 | Right front amplifier |
| F28 | Amplifier |
| F29 | Sunroof |
| F30 | Body control module 2 |
| F31 | Body control module 6 |
| F32 | Exterior rearview mirror |
| F33 | Right window |
| F34 | Power trunk module |
| F35 | On-board charging module |
| F36 | Alarm siren module |
| F37 | DC AC inverter |
| F38 | Rear blower |
| F39 | Fuel pump power |
| F40 | — |
| F41 | Rear seat power outlet |
| F42 | Left rear memory seat |
| F43 | — |
| F44 | Rear closure |
| F45 | Auxiliary audio/ Video/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 | Heated, cooled or ventilated seats (if equipped) |
| F54 | Rain sensor/Power sounder/Intrusion/ Universal remote system |
| F55 | Front memory seat module |
| F56 | Evaporative emissions leak check module |
| F57 | Voltage current temperature module |
| F58 | — |
| F59 | Engine control module power |
| F60 | Right motorized safety belt pretensioner |
| F61 | Parking lamps |
| F62 | — |
| F63 | — |
| F64 | Engine control module/Ignition |
| F65 | Rear glass sunshade |
| F66 | Rear vision camera/ Interior rearview mirror |
| F67 | DC DC converter/ Air quality sensor |
| F68 | Damping control module |
| F69 | — |
| F70 | — |
| F71 | — |
| F72 | — |
| F73 | — |
| F74 | — |
| F75 | — |
| Relays | Usage |
| R1 | Rear seat power outlet relay |
| R2 | Fuel pump relay |
| R3 | Run/Crank relay |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.