Fuses Guide: Cadillac CT5 2020 Fuses and Fuses Box Diagram
Fuse boxes are an important part of the 2020 Cadillac CT5 because they protect many electrical parts inside the car. The fuse box usually sits in the engine bay or the cabin’s interior. It holds a group of fuses that stop electrical overloads and short circuits. Understanding the Cadillac CT5’s fuse system is important for fixing electricity problems and making sure the car runs at its best. A complete fuse guide helps you understand what each fuse does by showing you which circuits it protects and how much current it can handle. A fuse box layout also shows where each fuse is located and what it’s supposed to do. This makes it easier to find and replace broken fuses. Knowing how the Cadillac CT5’s switch system works is important for keeping the car safe and working properly, whether you’re fixing problems with the lights, sound, or other electrical parts.
2024 Cadillac CT5 Specs, Price, Features, Mileage And Review
Electrical System
Electrical System Overload
The vehicle has fuses and circuit breakers to protect against an electrical system overload.
When the electrical load is too heavy a circuit breaker opens, protecting the circuit until overcurrent condition is removed. This greatly reduces the chance of circuit overload and fire caused by electrical problems. Fuses and circuit breakers protect electrical devices in the vehicle. Replace a blown or open fuse with a new one of identical size and rating.
If there is a problem on the road and a fuse needs to be replaced, the same amperage fuse can be borrowed. Choose some feature of the vehicle that is not needed to use and replace it as soon as possible.
Headlamp Wiring
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.
Windshield Wipers
If the wiper motor overheats due to heavy snow or ice, the windshield wipers will stop. The wiper function is available immediately after the wiper switch is set to off, and back to on.
To protect the wiper motor from overheating, the wipers may slow down when the windshield is dry for a long period. If a period of dry operation, or little moisture, exceeds 10 minutes, the wipers may switch to intermittent operation, and remain there. When moisture is again detected on the windshield, wiper operation will return to the operator-selected speed.
Although the circuit is protected from electrical overload, overload due to heavy snow or ice may cause wiper linkage damage. Always clear ice and heavy snow from the windshield before using the windshield wipers.
If the overload is caused by an electrical problem and not snow or ice, be sure to get it fixed.
Fuses and Circuit Breakers
The wiring circuits in the vehicle are protected from short circuits by a combination of fuses and circuit breakers. This greatly reduces the chance of damage caused by electrical problems.
Danger
Fuses and circuit breakers are marked with their ampere rating. Do not exceed the specified amperage rating when replacing fuses and circuit breakers. The use of an oversized fuse or circuit breaker can result in a vehicle fire. You and others could be seriously injured or killed.
To check a fuse, look at the silver-coloured band inside the fuse. If the band is broken or melted, replace the fuse. Be sure to replace a bad fuse with a new one of the identical size and rating.
Fuses of the same amperage can be temporarily borrowed from another fuse location if a fuse goes out. Replace the fuse as soon as possible.
Engine Compartment Fuse Block
The engine compartment fuse block is on the driver’s side of the engine compartment
Lift the fuse block cover to access the fuses. The vehicle may not be equipped with all of the fuses and relays shown.
Caution
Spilling liquid on any electrical component of the vehicle may damage it. Always keep the covers on any electrical component.
| Fuses | Usage |
| 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 | – |
| 7 | Electronic Brake Control Module |
| 8 | Washer Pump |
| 9 | – |
| 10 | – |
| 11 | – |
| 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 | – |
| 20 | – |
| 21 | Virtual Key System/ Power Sounder Module |
| 22 | – |
| 23 | Transmission Control Module |
| 24 | Active Engine Mount |
| 25 | – |
| 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 | – |
| 35 | Coolant pump |
| 36 | Starter Pinion |
| 37 | AC Clutch |
| 38 | – |
| 39 | – |
| 40 | – |
| 41 | – |
| 42 | Water Pump |
| 43 | – |
| 44 | – |
| Relays | Usage |
| 47 | – |
| 48 | Front Wiper Speed |
| 49 | Front Wiper Control |
| 51 | – |
| 52 | Engine Control Module |
| 53 | Starter Solenoid |
| 54 | Starter Pinion |
| 55 | – |
| 57 | AC Clutch |
| 58 | – |
Instrument Panel Fuse Block
The instrument panel fuse block is at the end of the driver side of the instrument panel.
To access the fuses, remove the end panel by gently prying with a plastic tool near each clip, beginning at the point shown.
To install the end cover, insert the tabs on the back of the cover into the slots in the instrument panel at the points shown. Align the clips with the slots in the instrument panel, and press the cover into place. The vehicle may not be equipped with all of the fuses and relays shown.
2024 Cadillac CT5 Specs, Price, Features, Mileage And Review
| Fuses | Usage |
| 1 | – |
| 2 | HVAC blower |
| 3 | – |
| 4 | – |
| 5 | Theft-deterrent/ Universal garage door opener |
| 6 | – |
| 7 | Air Quality Ionizer |
| 8 | Heated Steering Wheel |
| 9 | – |
| 10 | Electronic Steering Column Lock 1 |
| 11 | – |
| 12 | – |
| 13 | – |
| 14 | – |
| 15 | – |
| 16 | – |
| 17 | – |
| 18 | Display/ Infotainment/USB |
| 19 | Airbag/Automatic occupant sensing/ Data link connection/ Wireless charging module |
| 20 | Power steering column module/Electronic steering column lock 2 |
| 21 | – |
| 22 | – |
| 23 | – |
| 24 | – |
| 25 | USB |
| 26 | – |
| 27 | – |
| 28 | – |
| 29 | – |
| 30 | – |
| 31 | Headlamp Level |
| 32 | – |
| 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 |
| Circuit Breakers | Usage |
| CB1 | Auxiliary Power Outlet 1 |
| CB2 | Auxiliary Power Outlet 2 |
| Relays | Usage |
| 1 | Run After Park/ Accessory |
| 2 | Run Crank |
| 3 | – |
| 4 | – |
| 5 | – |
Rear Compartment Fuse Block
The rear compartment fuse block is behind a cover on the driver’s side of the rear compartment.
The vehicle may not be equipped with all of the fuses, relays, and features shown.
| Fuses | Usage |
| 1 | Remote Function Actuator |
| 2 | Engine control module |
| 3 | Driver Heated Seat |
| 4 | Fuel Tank Zone Module |
| 5 | – |
| 6 | – |
| 7 | – |
| 8 | – |
| 9 | – |
| 10 | Motor Seat Belt Passenger |
| 11 | Canister Vent Solenoid |
| 12 | Sunroof |
| 13 | – |
| 14 | – |
| 15 | Passenger Heated Seat |
| 16 | – |
| 17 | Electronic Suspension Control |
| 18 | – |
| 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 Module/ Short Range Radar |
| 24 | Passenger window door lock switch |
| 25 | – |
| 26 | Trailer |
| 27 | Rear Drive Control Module |
| 28 | – |
| 29 | – |
| 30 | – |
| 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 | Trailer 2 |
| 39 | Right Front/Right Rear Window |
| 40 | – |
| 41 | – |
| 42 | Amplifier |
| 43 | Park Assist Module |
| 44 | Driver Memory Seat Module |
| 45 | OnStar |
| 46 | – |
| 47 | – |
| 48 | – |
| 49 | Trailer |
| 50 | Driver Seat |
| 51 | Left Front/Left Rear Window |
| 52 | Passenger Seat |
| Relays | Usage |
| 53 | – |
| 54 | – |
| 55 | Run |
FAQs
A fuse is a protective device designed to interrupt the circuit in case of overcurrent. In the 2020 Cadillac CT5, fuses protect various electrical components from damage due to electrical faults.
You can visually inspect the fuse to see if the metal strip inside is intact. A blown fuse will have a broken or melted strip, or the fuse housing may appear discolored.
The fuse box in the 2020 Cadillac CT5 is typically located in the passenger compartment or under the hood.
Accessing the fuse box may vary depending on its location. Generally, you’ll need to open the fuse box cover, which may involve removing screws or clips.
Typically, you’ll only need a pair of needle-nose pliers to remove and install fuses. However, it’s always a good idea to keep a fuse puller or a set of automotive fuses on hand.
You should use a fuse with the same amperage rating as the one you’re replacing.
No, it’s not recommended. Using a fuse with a higher amperage rating can lead to damage to the electrical system or even a fire hazard.
Use needle-nose pliers to grip the fuse and pull it straight out of the fuse box. Be careful not to damage the fuse or surrounding components.
Simply align the new fuse with the corresponding slot in the fuse box and push it in until it’s fully seated.
You can usually replace a fuse yourself. It’s a simple and inexpensive repair that doesn’t require special tools or expertise.
If a new fuse blows immediately after replacement, it indicates that there’s an underlying electrical problem that needs to be addressed. In this case, it’s best to consult a mechanic.
Always make sure the ignition is turned off before replacing fuses to avoid electrical shock or damage to components.
It’s important to use automotive fuses that are compatible with your vehicle’s electrical system. Using the wrong type of fuse can lead to malfunction or damage.
Fuses typically last a long time and may not need to be replaced unless there’s a fault in the electrical system. However, if you’re experiencing frequent blown fuses, it could indicate an underlying issue.
Useful Link:
View full PDF: Cadillac CT5 2020 User Manual | Auto User Guide
2024 Cadillac CT5 Specs, Price, Features, Mileage And Review
Dashboard Display: Cadillac CT5 2020 Instrument Cluster Guide