Understanding the fuse box layout in your 2008 Cadillac Escalade is crucial for diagnosing and resolving electrical issues. Fuses protect your vehicle’s electrical circuits from overloads, and knowing their locations and functions can save you time and money on repairs. This guide will walk you through the fuse box diagrams for the 2008 Escalade, highlighting the fuses relevant to the OBD2 port and general electrical system maintenance.
The 2008 Cadillac Escalade utilizes three distinct fuse boxes, each serving different vehicle systems. These are the Underhood Fuse Block, the Instrument Panel Fuse Block, and the Center Instrument Panel Fuse Block. Locating and understanding these fuse boxes is the first step in troubleshooting any electrical problem, including issues that might affect your OBD2 port.
2008 Cadillac Escalade Underhood Fuse Box Diagram
Underhood Fuse Box Diagram
The Underhood Fuse Block is located in the engine compartment and houses fuses and relays for many critical vehicle functions. This fuse box is often the first place to check for issues related to engine controls, lighting, and various power accessories. Below is a breakdown of the fuses in this location:
| Type | Description |
|---|---|
| Fuse MINI | 1 Right Trailer Stop/Turn Lamp |
| Fuse MINI | 2 Electronic Stability Suspensión Control, Automatic Level Control Exhaust |
| Fuse MINI | 3 Left Trailer Stop/Turn Lamp |
| Fuse MINI | 4 Engine Controls |
| Fuse MINI | 5 Engine Control Module, Throttle Control |
| Fuse MINI | 6 Trailer Brake Controller |
| Fuse MINI | 7 Front Washer |
| Fuse MINI | 8 Oxygen Sensors |
| Fuse MINI | 9 Antilock Brakes System 2 |
| Fuse MINI | 10 Trailer Back-up Lamps |
| Fuse MINI | 11 Driver Side Low-Beam Headlamp |
| Fuse MINI | 12 Engine Control Module (Battery) |
| Fuse MINI | 13 Fuel Injectors, Ignition Coils (Right Side) |
| Fuse MINI | 14 Transmission Control Module (Battery) |
| Fuse MINI | 15 Vehicle Back-up Lamps |
| Fuse MINI | 16 Passenger Side Low-Beam Headlamp |
| Fuse MINI | 17 Air Conditioning Compressor |
| Fuse MINI | 18 Oxygen Sensors |
| Fuse MINI | 19 Transmission Controls (Ignition) |
| Fuse MINI | 20 Fuel Pump |
| Fuse MINI | 21 Fuel System Control Module |
| Fuse MINI | 22 Headlamp Washers |
| Fuse MINI | 23 Rear Windshield Washer |
| Fuse MINI | 24 Fuel Injectors, Ignition Coils (Left Side) |
| Fuse MINI | 25 Trailer Park Lamps |
| Fuse MINI | 26 Driver Side Park Lamps |
| Fuse MINI | 27 Passenger Side Park Lamps |
| Fuse MINI | 28 Fog Lamps |
| Fuse MINI | 29 Horn |
| Fuse MINI | 30 Passenger Side High-Beam Headlamp |
| Fuse MINI | 31 Daytime Running Lamps |
| Fuse MINI | 32 Driver Side High-Beam Headlamp |
| Fuse MINI | 33 Daytime Running Lights 2 |
| Fuse MINI | 34 Sunroof |
| Fuse MINI | 35 Key Ignition System, Theft Deterrent System |
| Fuse MINI | 36 Windshield Wiper |
| Fuse MINI | 37 SEO B2 Upfitter Usage (Battery) |
| Fuse MINI | 38 Electric Adjustable Pedals |
| Fuse MINI | 39 Climate Controls (Battery) |
| Fuse MINI | 40 Airbag System (Ignition) |
| Fuse MINI | 41 Amplifier |
| Fuse MINI | 42 Audio System |
| Fuse MINI | 43 Miscellaneous (Ignition), Cruise Control |
| Fuse MINI | 44 Liftgate Release |
| Fuse MINI | 45 Airbag System (Battery) |
| Fuse MINI | 46 Instrument Panel Cluster |
| Fuse MINI | 47 Power Take-Off |
| Fuse MINI | 48 Auxiliary Climate Control (Ignition), Compass-Temperature Mirror |
| Fuse MINI | 49 Center High-Mounted Stoplamp (CHMSL) |
| Fuse MINI | 50 Rear Defogger |
| Fuse MINI | 51 Heated Mirror |
| Fuse MINI | 52 SEO B1 Upfitter Usage (Battery) |
| Fuse MINI | 53 Cigarette Lighter, Auxiliary Power Outlet |
| Fuse MINI | 54 Automatic Level Control Compressor Relay, SEO Upfitter Usage |
| Fuse MINI | 55 Climate Controls (Ignition) |
| Fuse MINI | 56 Engine Control Module, Secondary Fuel Pump (Ignition) |
| Fuse FMX/JCase | 57 Cooling Fan 1 |
| Fuse FMX/JCase | 58 Automatic Level Control Compressor |
| Fuse FMX/JCase | 59 Heavy Duty Antilock Brake System |
| Fuse FMX/JCase | 60 Cooling Fan 2 |
| Fuse FMX/JCase | 61 Antilock Brake System 1 |
| Fuse FMX/JCase | 62 Starter |
| Fuse FMX/JCase | 63 Stud 2 (Trailer Brakes) |
| Fuse FMX/JCase | 64 Left Bussed Electrical Center 1 |
| Fuse FMX/JCase | 65 Electric Running Boards |
| Fuse FMX/JCase | 66 Heated Windshield Washer System |
| Fuse FMX/JCase | 67 Four-Wheel Drive System |
| Fuse FMX/JCase | 68 Stud 1 (Trailer Connector Battery Power) |
| Fuse FMX/JCase | 69 Mid-Bussed Electrical Center 1 |
| Fuse FMX/JCase | 70 Climate Control Blower |
| Fuse FMX/JCase | 71 Power Liftgate Module |
| Fuse FMX/JCase | 72 Left Bussed Electrical Center 2 |
| Relay | FAN HI Cooling Fan High Speed |
| Relay | FAN LO Cooling Fan Low Speed |
| Relay | FAN CNTRL Cooling Fan Control |
| Relay | HDLP LO/HID Hi Intensity Discharge Headlamp |
| Relay | FOG LAMP Front Fog Lamps |
| Relay | A/C CMPRSR Air Conditioning Compressor |
| Relay | STRTR Starter |
| Relay | PWR/TRN Powertrain |
| Relay | FUEL PMP Fuel Pump |
| Relay | PRK LAMP Parking Lamps |
| Relay | REAR DEFOG Rear Defogger |
| Relay | RUN/CRANK Switched Power |
2008 Cadillac Escalade Instrument Panel Fuse Box Diagram
Instrument Panel Fuse Box Diagram
The Instrument Panel Fuse Block is located inside the vehicle, often beneath the dashboard on the driver’s side. This box controls fuses for interior electronics, lighting, and convenience features. This is also a crucial area to check for issues related to interior functions and potentially the OBD2 port.
| Type | Description |
|---|---|
| Fuse MINI 20A | 1 Rear Seats |
| Fuse MINI 20A | 2 Rear Accessory Power Outlet |
| Fuse MINI 2A | 3 Steering Wheel Controls Backlight |
| Fuse MINI 15A | 4 Driver Door Module |
| Fuse MINI 15A | 5 Dome Lamps, Driver Side Turn Signal |
| Fuse MINI 15A | 6 Driver Side Turn Signal, Stoplamp |
| Fuse MINI 10A | 7 Instrument Panel Back Lighting |
| Fuse MINI 15A | 8 Passenger Side Turn Signal, Stoplamp |
| Fuse MINI 15A | 9 Passenger Door Module, Universal Home Remote System |
| Fuse MINI 15A | 10 Power Door Lock 2 (Unlock Feature) |
| Fuse MINI 15A | 11 Power Door Lock 2 (Lock Feature) |
| Fuse MINI 15A | 12 Stoplamps, Center-High Mounted Stoplamp |
| Fuse MINI 30A | 13 Rear Climate Controls |
| Fuse MINI 2A | 14 Not Used |
| Fuse MINI 10A | 15 Body Control Module (BCM) |
| Fuse MINI 20A | 16 Accessory Power Outlets |
| Fuse MINI 10A | 17 Interior Lamps |
| Fuse MINI 15A | 18 Power Door Lock 1 (Unlock Feature) |
| Fuse MINI 5A | 19 Rear Seat Entertainment |
| Fuse MINI 10A | 20 Ultrasonic Rear Parking Assist, Power Liftgate |
| Fuse MINI 15A | 21 Power Door Lock 1 (Lock Feature) |
| Fuse MINI 10A | 22 Driver Information Center (DIC) |
| Fuse MINI 25A | 23 Rear Wiper |
| Fuse MINI 30A | 24 Not Used |
| Fuse MINI 10A | 25 Driver Seat Module, Remote Keyless Entry System |
| Fuse MINI 15A | 26 Not Used |
| Connector | LT DR Driver Door Harness Connection |
| Connector | BODY1 Harness Connector |
| Connector | BODY2 Harness Connector |
2008 Cadillac Escalade Center Instrument Panel Fuse Block Diagram
Center Instrument Panel Fuse Block Diagram
The Center Instrument Panel Fuse Block is also located inside the cabin, often in the center console or a similar area. This fuse box typically handles circuits related to power windows, seats, and other body electrical functions. While less directly related to the OBD2 port, it’s good to be aware of its location for comprehensive troubleshooting.
| Type | Description |
|---|---|
| Connector | BODY 2 Body Harness Connector 2 |
| Connector | BODY 1 Body Harness Connector 1 |
| Connector | BODY 3 Body Harness Connector 3 |
| Connector | HEADLINER 3 Headliner Harness Connector 3 |
| Connector | HEADLINER 2 Headliner Harness Connector 2 |
| Connector | HEADLINER 1 Headliner Harness Connector 1 |
| Connector | SEO/UPFITTER Special Equipment Option Upfitter Harness Connector |
| Circuit breaker ATO | CB1 Passenger Side Power Window Circuit Breaker |
| Circuit breaker ATO | CB2 Passenger Seat Circuit Breaker |
| Circuit breaker ATO | CB3 Driver Seat Circuit Breaker |
| Circuit breaker ATO | CB4 Rear Sliding Window |
Identifying the OBD2 Port Fuse
While there isn’t a dedicated fuse labeled “OBD2 port” in the 2008 Cadillac Escalade fuse diagrams, the OBD2 port typically receives power from the same circuit as the cigarette lighter or accessory power outlets. In the Underhood Fuse Block, Fuse 53 (Cigarette Lighter, Auxiliary Power Outlet) is a prime suspect. Additionally, in the Instrument Panel Fuse Block, Fuse 16 (Accessory Power Outlets) might also be relevant.
If you are experiencing issues with your OBD2 port not powering up your scan tool, checking these fuses is a good first step. A blown fuse in either of these locations could disable the power supply to the OBD2 port, preventing communication with diagnostic tools.
Troubleshooting and Fuse Replacement
When diagnosing electrical problems in your 2008 Escalade, always consult these fuse box diagrams. If you suspect a blown fuse related to the OBD2 port or any other system, follow these steps:
- Locate the Fuse Box: Identify the correct fuse box based on the system you are troubleshooting (Underhood, Instrument Panel, or Center Instrument Panel).
- Identify the Fuse: Use the diagrams provided to locate the fuse associated with the system in question (e.g., Fuse 53 or 16 for OBD2 power).
- Inspect the Fuse: Visually inspect the fuse. A blown fuse will typically have a broken wire inside the clear plastic housing.
- Replace the Fuse: If the fuse is blown, replace it with a new fuse of the same type and amperage.
- Test the System: After replacing the fuse, test the affected system to see if the issue is resolved.
Important Note: If a fuse blows repeatedly, it indicates a more serious underlying electrical problem that needs professional diagnosis. Do not simply replace fuses continuously without investigating the root cause.
By understanding the fuse box diagrams and potential fuses related to the OBD2 port in your 2008 Cadillac Escalade, you can effectively troubleshoot common electrical issues and maintain your vehicle’s diagnostic capabilities. Always refer to your vehicle’s owner’s manual for the most accurate and up-to-date information on fuse locations and specifications.
