Passenger compartment fuse panel diagram of the 2005 Ford Crown Victoria
Passenger compartment fuse panel diagram of the 2005 Ford Crown Victoria

2005 Ford Crown Victoria OBD2 Fuse Location and Function Guide

Understanding the fuse box in your 2005 Ford Crown Victoria 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 specifically focus on the OBD2 fuse within the 2005 Ford Crown Victoria, providing a comprehensive overview of both fuse box locations and their diagrams.

The 2005 Ford Crown Victoria utilizes two distinct fuse boxes to manage its electrical systems: the Passenger Compartment Fuse Panel and the Power Distribution Box. Each box serves different circuits, and it’s important to understand where each is located and what fuses it contains, especially when troubleshooting issues related to your OBD2 port.

Passenger Compartment Fuse Panel

The passenger compartment fuse panel is located inside the vehicle. Knowing its exact location is the first step to accessing and inspecting fuses, including the one for your OBD2 port.

This fuse box is responsible for many of the interior and accessory functions of your Crown Victoria. Let’s examine the fuses within this panel in detail:

Type No. Description
Fuse MINI 15A 1 Taxi, Cluster, Lighting Control Module (Interior Lighting)
Fuse MINI 10A 2 Ignition (ON) Electronic Automatic Temperature Control (EATC) module, A/C mode switch (vehicles equipped with EATC only)
Fuse MINI 10A 3 EATC module (vehicles equipped with EATC only) Audio (base audio system on vehicles not equipped with EATC)
Fuse MINI 10A 4 Ignition (ON) Anti-lock Brake System (ABS) module, Positive Crankcase Ventilation (PCV)
Fuse MINI 10A 5 Speed control deactivation switch, Stop signal, Brake-Transmission Shift Interlock (BTSI) (column-shift transmission)
Fuse MINI 10A 6 Ignition (ON) – Cluster
Fuse MINI 10A 7 LCM (Park lamps, Switch illumination)
Fuse MINI 10A 8 Ignition (ON) – Rear Air Suspensión Module (RASM), Variable Assist POwer Steering (VAPS)
Fuse MINI 20A 9 LCM (Headlamps, Cornering lamps)
Fuse MINI 5A 10 Ignition (ON/START) – Driver’s Door Module (DDM), Police PDB (Police vehicles only)
Fuse MINI 10A 11 Ignition (START) – ON/ACC (window) relay coil (non-Police vehicles only) Ignition (START) – ON/ACC (window and decklid) relay coil and Police ON/ACC relay coil (Police vehicles only)
Fuse MINI 10A 12 Ignition (ON/START) – Starter relay coil, DTRS
Fuse MINI 10A 13 Ignition (START) – Wiper module
Fuse MINI 10A 14 Ignition (ON) – BTSI (Floor-shift transmission)
Fuse MINI 7.5A 15 Ignition (START) – LCM, Door lock switch illumination, Heated seat switch illumination, Moonroof, Overhead console, Electrochromatic mirror
Fuse MINI 15A 16 Ignition (ON) – Turn signals
Fuse MINI 10A 17 Ignition (START) – Audio
Fuse MINI 10A 18 Ignition (ON) – A/C mode switch (manual A/C only), Blend door, DDM, Heated seat modules, Daytime Running Lamps (DRL) module
Fuse MINI 10A 19 Left-hand low beam, DRL
Fuse MINI 10A 20 Ignition (ON/ACC) – Back-up lamps
Fuse MINI 10A 21 Right-hand low beam, DRL
Fuse MINI 10A 22 Ignition (ON/ACC) – Restraint Control Module (RCM), Occupant Classification Sensor (OCS), Passenger Air bag Deactivation Indicator (PADI)
Fuse MINI 15A 23 Multi-function switch (Flash-to-pass)
Fuse MINI 10A 24 Ignition (ON/ACC) – Passive Anti-Theft System (PATS) module, Powertrain Control Module (PCM) relay coil, Fuel relay coil, Ignition coil relay coil
Fuse MINI 10A 25 Autolamp/Sunload sensor, Power mirrors, Door lock switches (DDM), Adjustable pedal switch
Fuse MINI 10A 26 Ignition (ON/ACC) – Analog cluster, Warning lamp module, LCM, Overdrive cancel switch, Rear defroster relay coil
Fuse MINI 20A 27 Cigar lighter, OBD II, Power point
Fuse MINI 10A 28 Center High-Mounted Stop Lamp (CHMSL)
Fuse MINI 15A 29 Audio
Fuse MINI 15A 30 Stop lamps, MFS
Fuse MINI 15A 31 Hazards (non-Police vehicles)
Fuse MINI 20A 31 Hazards (Police vehicles)
Fuse MINI 10A 32 Mirror heaters, Rear defroster switch indicator
Relay K101 Rear defroster

Locating the OBD2 Fuse:

As highlighted in the table above, Fuse #27 in the Passenger Compartment Fuse Panel is designated for the Cigar lighter, OBD II, and Power point. This is the fuse you need to check if you are experiencing issues with your OBD2 port, such as a scanner not powering on when connected. It’s a 20A MINI fuse.

If your OBD2 scanner is not working, a blown Fuse #27 is a common culprit. Before replacing the fuse, it’s crucial to identify the underlying cause of the fuse blowing to prevent recurrence.

Power Distribution Box

The second fuse box is the Power Distribution Box, typically located in the engine compartment. This box houses fuses and relays that manage higher-current systems in your 2005 Ford Crown Victoria.

Here’s a breakdown of the components within the Power Distribution Box:

Type No. Description
Fuse MINI 20A 1 Ignition switch (Key in, RUN 1, RUN 2)
Fuse MINI 25A 2 Ignition switch (RUN/START, RUN/ACC, START)
Fuse MINI 10A 3 Powertrain Control Module (PCM) keep alive power
Fuse MINI 20A 4 Fuel relay feed
Fuse MINI 10A 5 Rear Air Suspensión Module (RASM), VAPS module
Fuse MINI 15A 6 Alternator regulator
Fuse MINI 30A 7 PCM relay feed
Fuse MINI 20A 8 Driver’s Door Module (DDM), Door locks
Fuse MINI 15A 9 Ignition coil relay feed
Fuse MINI 20A 10 Horn relay feed
Fuse MINI 15A 11 A/C clutch relay feed
Fuse MINI 25A 12 Audio (non-Police vehicles only) Tray lamps (Police vehicles only)
Fuse MINI 20A 13 Instrument panel power point
Fuse MINI 20A 14 Stop lamp switch
Fuse MINI 20A 15 Heated seats
Fuse MINI 20A 16 Daytime Running Lamps (DRL) module
Fuse MINI 15A 19 Injectors
Fuse MINI 15A 20 PCM, Mass Air Flow (MAF) sensor
Fuse MINI 15A 21 Powertrain loads and sensors
Fuse MINI 5A 24 Radio mute
Fuse FMX/JCase 40A 101 Blower relay feed
Fuse FMX/JCase 50A 102 Cooling fan
Fuse FMX/JCase 50A 103 Instrument panel (I/P) fuse box feed #1, I/P fuses 23, 25, 27 and 31
Fuse FMX/JCase 40A 104 Instrument panel (I/P) fuse box feed #2, I/P fuses 1, 3, 5, 7 and 9
Fuse FMX/JCase 30A 105 Starter relay feed
Fuse FMX/JCase 40A 106 Anti-lock Brake System (ABS) module (Pump)
Fuse FMX/JCase 40A 107 Rear defroster relay feed
Fuse FMX/JCase 20A 108 Moonroof (non-Police vehicles only) Spotlights (available on Police vehicles, Long Wheel Base [LWB] vehicles and commercial vehicles only)
Fuse FMX/JCase 20A 109 ABS module (Valves)
Fuse FMX/JCase 30A 110 Wiper module
Fuse FMX/JCase 50A 111 Police PDB or Police I/P accessory battery feed (Police vehicles only)
Fuse FMX/JCase 30A 112 Air suspensión compressor (non-Police vehicles only)
Fuse FMX/JCase 40A 112 Police PDB relay feed (Police vehicles only)
Fuse FMX/JCase 50A 113 Police light bar or Police Trunk accessory battery feed (Police vehicles only)
Fuse FMX/JCase 50A 114 Police PDB or Police I/P accessory battery feed (Police vehicles only)
Fuse FMX/JCase 50A 115 Rear power point or Police trunk accessory battery feed (Police vehicles only)
Fuse FMX/JCase 50A 116 Police I/P accessory battery feed (Police vehicles only)
Fuse FMX/JCase 50A 117 Police PDB or Police I/P accessory battery feed (Police vehicles only)
Fuse FMX/JCase 50A 118 Rear power point or Police trunk accessory battery feed (Police vehicles only)
Relay 201 A/C clutch
Relay 203 Ignition coil
Relay 204 PCM
Relay 206 Fuel
Relay 209 Horn
Relay 301 Starter
Relay 302 Air compressor (non-Police vehicles only) RUN/ACC relay (Police vehicles only)
Relay 303 Blower
Relay 304 RUN/ACC relay (windows) (non-police vehicles only) RUN/ACC relay (windows and decklid) (police vehicles only)
Diode ATO 501 A/C clutch
Diode ATO 502 PCM
Diode ATO 503 Horn, Door latch
Circuit breaker MAXI 601 Power seats, Lumbar, Decklid
Circuit breaker MAXI 602 RUN/ACC relay (windows) (non-police vehicles only) RUN/ACC relay feed (windows and decklid) (police vehicles only)

While the Power Distribution Box doesn’t directly house the OBD2 fuse, it’s important to understand its role in the overall electrical system of your 2005 Ford Crown Victoria. This box manages vital systems like the PCM, ABS, and cooling fan.

Conclusion:

When addressing OBD2 port issues in your 2005 Ford Crown Victoria, always start by checking Fuse #27 (20A MINI) in the Passenger Compartment Fuse Panel. This fuse powers the OBD2 port and is a common point of failure. Utilizing these fuse box diagrams and descriptions will empower you to effectively diagnose and fix electrical problems in your vehicle. Remember to always consult your vehicle’s owner’s manual for the most accurate and up-to-date information regarding your specific 2005 Ford Crown Victoria model.

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