Cadillac CT4 (2020-…) fuses and relays

 

The compact executive sedan Cadillac CT4 is available from 2020 to the present. In this article, you will find fuse box diagrams of Cadillac CT4 2020, 2021, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

Fuse Layout Cadillac CT4 2020, 2021

Cigar lighter (power outlet) fuses in the Cadillac CT4 are the Circuit Breakers CB1 and CB2 in the Instrument panel fuse box.

Fuse Box Location

Passenger compartment

The instrument panel fuse block is at the end of the driver side of the instrument panel. To access, remove the end cover by gently prying with a plastic tool near each clip, beginning at the point shown.
To install the cover, insert the tabs on the back of the cover into the slots in the instrument panel. Align the clips with the slots in the instrument panel, and press the cover into place.The location of the fuses in the passenger compartment: Cadillac CT4 (2020, 2021)

Engine compartment

The engine compartment fuse block is on the driver’s side of the engine compartment. Lift the cover to access the fuses.The location of the fuses in the engine compartment: Cadillac CT4 (2020, 2021)

Luggage compartment

The rear compartment fuse block is behind a cover on the driver side of the rear compartment.The location of the fuses in the trunk: Cadillac CT4 (2020, 2021)



Fuse Box Diagrams

2020, 2021

Passenger compartment

Instrument panel fuse box diagram: Cadillac CT4 (2020, 2021)

Assignment of the fuses in the instrument panel (2020, 2021)

Description
1 Not Used
2 HVAC blower
3 Not Used
4 Not Used
5 Theft deterrent/ Universal garage door opener
6 Not Used
7 Air quality ionizer
8 Heated steering wheel
9 Not Used
10 Electronic steering column lock 1
11 Not Used
12 Not Used
13 Not Used
14 Not Used
15 Not Used
16 Not Used
17 Not Used
18 Display/ Infotainment/ USB/ CSM
19 Airbag/Automatic occupant sensing/ Data link connection/ Wireless charging module
20 Power steering column module/ Electronic steering column lock 2
21 Not Used
22 Not Used
23 Not Used
24 Not Used
25 USB
26 Not Used
27 Not Used
28 Not Used
29 Not Used
30 Not Used
31 Headlamp level
32 Not Used
33 Body ignition/ IP ignition
34 Exhaust valve
35 Transmission control module ignition/ Engine control module ignition/Shift ignition/Brake ignition
36 Shift module
37 Body control module 1/ Electronic park brake switch
38 Center stack module
39 Steering wheel controls
40 Body control module 2
41 Body control module 3
42 Body control module 4
CB1 Auxiliary power outlet 1 (Circuit Breaker)
CB2 Auxiliary power outlet 2 (Circuit Breaker)
Relays
1 Run after park/ Accessory
2 Run crank
3 Not Used
4 Not Used
5 Not Used


Engine compartment

Under-hood fuse box diagram: Cadillac CT4 (2020, 2021)

Assignment of the fuses and relays in the engine compartment (2020, 2021)

Description
1 Long range radar front sensor
2 Park/Daytime running lamps
3 Exterior lighting module 4
4 Exterior lighting module 7
5 Headlamp level
6 Not Used
7 Electronic brake control module
8 Washer pump
9 Not Used
10 Not Used
11 Not Used
12 Horn
13 Front wiper
14 Exterior lighting module 6
15 Exterior lighting module 1
16 Exterior lighting module 5
17 Exterior lighting module 3
18 Aero shutter
19 Not Used
20 Not Used
21 Virtual key system/ Power sounder module
22 Engine control module
23 Transmission control module/Transmission reverse lock out
24 Active engine mount
25 Not Used
26 Engine control module
27 Injectors/Ignition 2
28 Charged air cooler
29 Transmission aux oil pump/Transmission reverse lock out
30 Injectors/Ignition 1
31 Emissions 1
32 Emissions 2
33 Starter solenoid
34 Not Used
35 Not Used
36 Starter pinion
37 AC clutch
38 Not Used
39 Not Used
40 Not Used
41 Not Used
42 Water pump
43 Not Used
44 Not Used
Relays
47 Not Used
48 Front wiper speed
49 Front wiper control
51
52 Engine control module
53 Starter solenoid
54 Starter pinion
55 Not Used
57 AC clutch
58 Not Used


Luggage compartment

Trunk fuse box diagram: Cadillac CT4 (2020, 2021)

Assignment of the fuses and relays in the trunk (2020, 2021)

Description
1 Remote function actuator
2 Not Used
3 Driver heated seat
4 Fuel tank zone module
5 Not Used
6 Not Used
7 Not Used
8 Not Used
9 Not Used
10 Motor seat belt passenger
11 Canister vent solenoid
12 Sunroof
13 Not Used
14 Not Used
15 Passenger heated seat
16 Not Used
17 Electronic suspension control
18 Not Used
19 Motor seat belt driver
20 Rear defog
21 DC to DC transformer 2
22 Driver power window door lock switch
23 External object calculating module/ Front camera module/High definition localization/Short range radar
24 Passenger window door lock switch
25 Not Used
26 Amplifier (V-series)
27 Rear drive control module
28 Not Used
29 Not Used
30 Not Used
31 DC to DC transformer 1
32 Transfer case electronic control
33 Central gateway module / Side blind zone alert
34 Video processing module
35 Hands free closure release
36 Exterior lighting module 2
37 Passenger memory seat module
38 Not Used
39 Right front/ Right rear window
40 Not Used
41 Not Used
42 Amplifier
43 Park assist module
44 Driver memory seat module
45 OnStar
46 Not Used
47 Not Used
48 Not Used
49 Not Used
50 Driver seat
51 Left front/Left rear window
52 Passenger seat
Relays
53 Not Used
54 Not Used
55 Run


Leave a Reply

Your email address will not be published. Required fields are marked *