The 2003 Acura TL is equipped with multiple fuse boxes that protect various electrical components. Understanding the fuse box diagram is crucial for troubleshooting electrical issues and maintaining your vehicle's electrical system.

Fuse Box Locations

The 2003 Acura TL has two main fuse boxes:

1. Interior Fuse Box: Located in the driver's side foot well, under the dashboard.

2. Under-hood Fuse Box: Found in the engine compartment.

Interior Fuse Box

The interior fuse box is responsible for many of the car's interior components, such as the dome light, stereo, and power windows.

Interior Fuse Box No. 1

This fuse box contains fuses for essential systems like:

  • PGM-FI Main Relay
  • Supplemental Restraint System (SRS) Unit
  • HVAC system
  • ABS-TCS Control Unit
  • Daytime Running Lights (DRL) Control Unit

Interior Fuse Box No. 2

This fuse box includes fuses for:

  • Power windows
  • Power seats
  • Accessory power sockets
  • Audio system
  • Navigation system (if equipped)

Under-hood Fuse Box

The under-hood fuse box contains fuses for major electrical systems and engine components.

Main Fuses

  • 120A fuse: Alternator and battery
  • 60A fuse: Ignition switch

Other Important Fuses

  • Headlights
  • Horn
  • ABS/TCS system
  • Radiator fan
  • A/C compressor

Checking and Replacing Fuses

To check a fuse:

1. Locate the suspected blown fuse using the diagram on the fuse box cover.

2. Remove the fuse using the provided fuse puller.

3. Inspect the metal strip inside the fuse. If it's broken, the fuse is blown.

To replace a fuse:

1. Always replace with a fuse of the same amperage rating.

2. Insert the new fuse into the same slot.

3. Ensure it's securely seated.

Important: Never replace a blown fuse with one of a higher amperage rating, as this can cause electrical system damage.

Relay Boxes

The 2003 Acura TL also has relay boxes in the engine compartment:

1. Relay Box No. 1: Contains relays for ABS pump motor and TCS.

2. Relay Box No. 2: Houses relays for shift lock, taillights, and seat heaters.

3. Relay Box No. 3: Includes relays for the ABS system.

Understanding these relay locations can be helpful when diagnosing electrical issues.

FAQs About 2003 Acura TL Fuse Box Diagram

    • What should I do if I can't find the fuse I'm looking for?
      Consult your owner's manual or the diagrams on the fuse box covers. If you're still unsure, it's best to seek help from a professional mechanic.
    • Can I use a fuse from another slot if I don't have the correct amperage?
      No, always use a fuse with the correct amperage rating. Using the wrong amperage can cause electrical system damage or even fire.
    • How often should I check my car's fuses?
      It's a good idea to check your fuses periodically, especially if you're experiencing electrical issues. However, fuses typically only need to be checked when a specific electrical component stops working.