Replacing a Blown Fuses: 2015 Cadillac CTS Fuse Diagrams Guide

Replacing a Blown Fuses: 2015 Cadillac CTS Fuse Diagrams Guide

The 2015 Cadillac CTS is a marvel of performance and luxury in the complex maze of automotive engineering. However, even the best-built devices occasionally experience problems, and blown fuses are often the cause of electrical malfunctions. Comprehending the complexities of the 2015 Cadillac CTS Fuse Diagram is essential for promptly identifying and resolving such problems. We discover the intricate connections between the car’s many systems as we go through the fuse box, exploring a world where technology and electricity coexist. By navigating this complex web, owners, and enthusiasts of cars can confidently take on the seemingly difficult task of replacing a blown fuse, ensuring the continuous harmony of this automotive masterpiece while it is driven. Come along with us as we break down the fuse diagram, helping you to understand its complexities and maintain the smooth operation of your 2015 Cadillac CTS.

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Electrical System

Electrical System Overload
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. 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. 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. To identify and check fuses, circuit breakers, and relays, 

Engine Compartment Fuse Block

The underhood 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.

Number	Usage
1	Not Used
2	Not Used
*3	Passenger Motorized Seat Belt
4	Body Control Module 6
5	Not Used
6	Driver Power Seat
7	Not Used
*8	Headlamp Washer Relay
9	Not Used
10	Not Used
11	Not Used
12	Not Used
13	Passenger Power Seat
14	Body Control Module 5
15	Front Wiper

Number	Usage
16	Not Used
*17	Headlamp Washer
18	Not Used
19	Antilock Brake System Pump
20	Antilock Brake System Valve
*21	AIR Pump
22	Driver Motorized Seat Belt
23	Wiper Control Relay
24	Wiper Speed Relay
25	Engine Control Module Relay
*26	AIR Pump Relay
27	Spare/Heated Seat 2
28	Body Control Module 1/Spare

Number	Usage
*29	AFS AHL/ Pedestrian Protection
30	Passenger Window Switch
31	Body Control Module 7
32	Sunroof
33	Not Used
34	AOS Display/MIL Ignition
35	Rear Electrical Center Ignition
36	Spare PT Fuse
37	Oxygen Sensor
38	Ignition Coils/ Injectors
39	Ignition Coils/ Injectors/Spare
40	Engine Control Module

Number	Usage
41	Fuel Heater
*42	AIR Solenoid Relay
43	Washer
44	Not Used
45	Front Washer Relay
46	Not Used
47	Instrument Panel Body Ignition
48	Fuel System Control Module Ignition
49	Heated Steering Wheel
*50	Steering Column Lock
*51	Coolant Pump
*52	Coolant Pump Relay
53	Air Conditioning Compressor Clutch

Number	Usage
*54	AIR Solenoid
55	Transmission Control Module/ Spare
*56	Headlamp Low Relay
57	Headlamp High Relay
58	Starter
59	Starter Relay
60	Run/Crank Relay
*61	Vacuum Pump Relay
62	Air Conditioning Control Relay
*63	Adaptive Headlamp Leveling
*64	Left HighIntensity Discharge Headlamp

Number	Usage
*65	Right HighIntensity Discharge Headlamp
66	Headlamp High Left/Right
67	Horn
68	Horn Relay
69	Cooling Fan
70	Aero Shutter
71	Transmission Control Module Ignition
72	Engine Control Module Ignition
*73	Brake Vacuum Pump
74	Not Used

* Optional

Instrument Panel Fuse Block

The instrument panel fuse block is behind the driver-side instrument panel storage compartment.

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.

Mini Fuses	Usage
2	Motorized Cupholder
3	Electric Steering Column Lock
4	Data Link Connector
5	Heater, Ventilation, and Air Conditioning Control
6	Tilt and Telescoping Steering Column
8	Spare
9	Glove Box Release
10	Shunt
11	Body Control Module 1
12	Body Control Module 5
13	Spare
14	Spare
15	Spare

Mini Fuses	Usage
16	Spare
17	Spare
18	Spare
19	Spare
20	Spare
21	Spare
22	Sensing Diagnostic Module/Automatic Occupant Sensing
23	Radio/DVD/Heater, Ventilation, and Air Conditioning
24	Display
25	Heated Steering Wheel
26	Wireless Charger
27	Steering Wheel Switches
28	Spare
29	Visor

Mini Fuses	Usage
30	Spare

J Case Fuses	Usage
31	Spare
32	Spare
33	Front Heater, Ventilation, and Air Conditioning Blower

Circuit Breakers	Usage
CB1	Retained Accessory Power/Accessory Power Outlet Power
CB7	Spare

Relays	Usage
K10	Retained Accessory Power/Accessory
K605	Logistics

Relays	Usage
K644	Glove Box Release

Rear Compartment FuseBlock

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.

Number	Usage
*1	Electronic Limited Slip Differential/DC DC Transformer
2	Left Window
3	Body Control Module 8
*4	A/C Inverter
5	Passive Entry Passive Start Battery 1
6	Body Control Module 4
7	Heated Mirrors
8	Amplifier
9	Rear Window Defogger
10	Glass Break
*11	Trailer Connector
12	OnStar (If Equipped)
13	Right Window

Number	Usage
14	Electric Parking Brake
15	Not Used
16	Trunk Release
*17	Run Relay
*18	Logistics Relay
*19	Logistics Fuse
20	Rear Window Defogger Relay
21	Mirror Window Module
22	Pedestrian Protection
23	Canister Vent
24	Body Control Module 2
*25	Rear Vision Camera
*26	Front Ventilated Seats
*27	SBZA/LDW/EOCM

Number	Usage
*28	Trailer/Sunshade
*29	Rear Heated Seats
*30	Semi-Active Damping System
*31	Transfer Case Control Module/ Electronic Limited Slip Differential
32	Theft Module/ Universal Garage Door Opener/Rain Sensor
*33	UPA
*34	Radio/DVD
35	Spare
*36	Trailer
37	Fuel Pump/Fuel System Control Module
38	Not Used
39	Not Used

Number	Usage
40	Not Used
41	Not Used
*42	Memory Seat Module
43	Body Control Module 3
44	Not Used
45	Battery Regulated Voltage Control
46	Engine Control Module Battery
47	Not Used
48	Not Used
*49	Trailer Module
50	Door Lock Security
51	Rear Closure Release
52	Not Used
53	Not Used
54	Door Lock Security

Number	Usage
55	Not Used
*56	Fuel Door

Optional

Replacing Fuse

Required Materials:

1. The fuse puller from the fuse box cover or needle-nose pliers.
2. Substitute fuses with the right amperage.
3. The owner’s manual, for information.

Step by step:

1. Switch off the Vehicle:
   • Make sure the key is out of the ignition switch and that the ignition is off.
2. Fuse Box Location:
   • Usually found under the dashboard or in the engine compartment, the 2015 Cadillac CTS fuse box. 
3. Identify the Blown Fuse:
   • Locate the fuse that corresponds to the broken system using the fuse diagram found in the owner’s manual or on the cover of the fuse box.
4. Take out the blown fuse
   • With the fuse puller or needle-nose pliers, carefully grab the blown fuse and pull it out straight. To prevent breaking the fuse or the fuse box, take care not to apply too much force
5. Inspect the Fuse:
   • Check for a broken filament or a discolored appearance on the blown fuse. This will verify that the fuse is malfunctioning.
6. Choose an Alternative Fuse:
   • Select a substitute fuse that has the identical amperage rating as the one you took out. Usually, the fuse’s top is marked with the amperage rating.
7. Put in the Replacement Fuse:
   • Ensure that the replacement fuse is seated firmly by aligning it with the fuse socket. Verify that it fits snugly.
8. Check the System:
   • To make sure the replaced fuse is operating properly, turn on the car and examine the system linked to it.
9. Replace the Fuse Box Cover: If necessary, do so and fasten it firmly in position.
10. Document Replacements:
    • Keep a record of the fuses you change. If a particular fuse keeps blowing, there might be an underlying electrical problem that needs to be professionally fixed.

To prevent doing more harm to the car’s electrical system, it is best to get professional help if you are unsure or run into problems.

How to Replace Fuses of Cadillac CTS

FAQs

Useful Links

View Full PDF: 2015 Cadillac CTS Owner’s Manual| Auto User Guide

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2015 Cadillac CTS Display Screen | Warning Messages Guide