Cadillac CT5

Cadillac CT5 2023 Headlamp and Electrical System User Guide


Cadillac CT5 2023 Headlamp Aiming and Electrical System User Guide

Headlamp Aiming

Front Headlamp Aiming

The headlamp aim has been preset and should need no further adjustment. If the vehicle is damaged in a crash, the headlamp aim may be affected. If adjustment to the headlamps is necessary, see your dealer.

Bulb Replacement

LED Lighting
This vehicle has LED lamps. For replacement of any LED lighting assembly, contact your dealer.

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.
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.
To check a fuse, look at the band inside the fuse. If the band is broken or melted, replace the fuse. Be sure to replace a bad fuse with a fuse of identical size and rating.Headlamp Aiming and Electrical System1

Headlamp Aiming1

Replacing a Blown Fuse

  1. Turn off the vehicle.
  2. Locate the fuse puller in the engine compartment fuse block.
    Headlamp Aiming12Headlamp Aiming13
  3. Use the fuse puller to remove the fuse from the top or side, as shown above.
  4. If the fuse must be replaced immediately, borrow a replacement fuse with the same amperage from the fuse block. Choose a vehicle feature that is not needed to safely operate the vehicle. Repeat Steps 2-3.
  5. Insert the replacement fuse into the empty slot of the blown fuse.

At the next opportunity, see your dealer to replace the blown fuse.

Headlamp Wiring

An electrical overload may cause the lamps o go on and off, or in some cases to remain off. Has 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 until the motor cools and will then restart.
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.

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.

Installation or use of fuses that do not meet GM’s original fuse specifications is dangerous. The fuses could fail, and result in a fire. You or others could be injured or killed, and the vehicle could be damaged. See Accessories and Modifications 0 291 and General Information 0 291.
To check or replace a blown fuse, see Electrical System Overload 0 318.

Engine Compartment Fuse Block

The under-hood fuse block is in the engine compartment, on the driver side of the vehicle.Headlamp Aiming and Electrical System2

Do not pull the engine compartment fuse block lever, since it is intended only for service purposes. If pulled, vehicle malfunction may occur.

Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component.
To remove the fuse block cover, press the clips on the cover and lift it straight up.
The vehicle may not be equipped with all of the fuses, relays, and features shown.Headlamp Aiming and Electrical System1

Fuses Usage
F1 Antilock Brake System
F2 Starter 1

Fuses Usage
F3 DC DC Transformer 1
F4 –

Fuses Usage
F5 DC DC Transformer 2
F6 Amplifier 1
F7 Front Blower
F8 Starter 3
F9 –
F10 –
F11 –
F12 Front Wiper
F13 Starter 2
F14 LED/Automatic Headlamp
F15 Rear Wiper 1
F16 –
F17 –
F18 Automatic Headlamp
Leveling Module
F19 –
F20 –
F21 –
F22 Electronic Brake Control

Fuses Usage
F23 Parking/Trailer Lamps
F24 Right Trailer Stoplamp/
Turn lamp
F25 Steering Column Lock
F26 –
F27 Left Trailer Stoplamp/
F28 –
F29 –
F30 Washer Pump
F31 –
F32 –
F33 Fog Lamps
F34 Horn
F35 –
F36 Headlamp High-Beam Left
F37 Headlamp High-Beam
F38 Spare
F39 Transmission Control
Module 1/Battery 1

Fuses Usage
F40 Left Rear Bus Electrical
F41 Instrument Cluster
F42 Heating, Ventilation, and
Air Conditioning/Central
Gateway Module Run

F43 Head-up Display/
Reflective Light Alert

F44 Electronic Brake Control
Module Electric Brake
F45 –
F46 –
F47 –
F48 Rear Wiper 2
F49 Interior Rearview Mirror/
Trailer/Rear Heated Seat

Run Crank
F50 Fuel Tank Zone Module

Run Crank
F51 Heated Steering Wheel

Fuses Usage
F52 Air Conditioning Clutch
F53 Coolant Pump
F54 –
F55 –
F56 Spare
F57 Engine Control Module/
F58 Transmission Control
F59 Engine Control Module

F60 –
F61 O2 Sensor 1/Aeroshutter/
Mass Air Flow Sensor
F62 Engine Control
Module – Odd
F63 O2 Sensor 2
F64 Engine Control
Module – Even
F65 Engine Control Module
Powertrain 1

Fuses Usage
F66 Engine Control Module
Powertrain 2
F67 Engine Control Module
Powertrain 3
F68 –
F69 –
F70 –
F71 –
F72 –
F73 –
F74 –
F75 –
F76 –
F77 –

Relays Usage
K1 Starter 1
K2 Run/Crank
K3 Starter 3
K4 LED/Automatic
Relays Usage
K5 –
K6 –
K7 Engine Control Module
K8 Air Conditioning
K9 –
K10 Starter 2

Instrument Panel Fuse Block

The instrument panel fuse block is in the end of the driver side of the instrument panel.Headlamp Aiming16

To access the fuses, remove the end panel by gently prying with a plastic tool near each clip, beginning at the point shown.Headlamp Aiming and Electrical System3

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.Headlamp Aiming and Electrical System4

Fuses Usage
F1 Body Control Module 6

Fuses Usage
F2 Diagnostic Link/Central
Gateway Module
F3 Electric Steering
Column Lock
F4 –
F5 Logistics
F6 Heating, Ventilation and
Air Conditioning/
Humidity Sensor
F7 Body Control Module 3
F8 Park Aid/Electronic
Range Select Hybrid
F9 Front Passenger
Heated Seat
F10 Airbag/Seat Belt
F11 –
F12 Amplifier 2
F13 Body Control Module 7
F14 Driver Heated Seat
F15 Instrument Panel
Switch Bank
F16 Sunroof

Fuses Usage
F17 Body Control Module 1
F18 Instrument Cluster/
Heads-Up Display
F19 –
F20 Rear Seat Entertainment
F21 Body Control Module 4
F22 Infotainment USB Data/
Aux Jack
F23 Body Control Module 2
F24 USB Charger/Wireless
F25 Park Aid/Electronic
Transmission Range
F26 Communication
Integration Module
F27 Video/Night Vision
F28 Heating, Ventilation,
and Air Conditioning
F29 Radio

Fuses Usage
F30 Steering Wheel
Adjustment Controls
F31 Electronic Brake Control
Module Electric Brake
F32 DC AC Inverter
F33 Driver Power Seat
F34 Passenger Power Seat
F35 Battery IEC 1 Feed
F36 Electric Power Steering
F37 Rear Seat
Charging Module
F38 Body Control Module 8
F39 –
Circuit Breakers/
F40 –
F41 –
F42 Auxiliary Power Outlet
(CB)/Lighter (Minifuse)

Rear Compartment Fuse BlockHeadlamp Aiming and Electrical System5

The rear compartment fuse block is behind a trim panel on the driver side of the rear storage compartment.
The vehicle may not be equipped with all of the fuses, relays, and features shown.Headlamp Aiming21

Fuses Usage

  1. Remote Function
    Fuses Usage
  2. Driver Heated Seat
  3. Fuel Tank Zone Module
  4.  –
  5.  Motor Seat Belt
  6. Canister Vent Solenoid
  7. Sunroof
  8. Passenger Heated Seat
  9. Electronic Suspension
  10.  –
  11. Motor Seat Belt Driver
    Fuses Usage
  12.  Rear Defog
  13. DC to DC Transformer 2
  14. Driver Power Window/
    Door Handle Switch
  15. External Object
    Calculating Module/Front
    Camera Module/High
    Definition Localization
    Module/Short-Range Radar
  16. Passenger Power
    Window/Door Handle Switch
  17. Amplifier (V-Series Blackwing)
  18. Rear Drive Control
  19.  –
  20.  –
  21. DC to DC Transformer 1
    Fuses Usage
  22. Transfer Case Electronic
  23. Central Gateway
    Module/Side Blind Zone
  24. Video Processing Module
  25. Hands Free Closure
  26. Exterior Lighting
    Module 2
  27. Passenger Memory Seat
    38 –
  28. Right Front/Right Rear
  29.  –
  30.  –
  31. Amplifier
  32. Park Assist Module
  33. Driver Memory Seat
  34. OnStar
    Fuses Usage
  35.  –
  36.  –
  37.  –
  38.  –
  39. Driver Seat
  40. Left Front/Left Rear
  41.  Passenger Seat
    Relays Usage
    53 –
    54 –
    55 Run

Cadillac Top Accessories

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Reference Links

View Full User Guide: Cadillac CT5 2023 User Guide

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