2004 Lexus Es330 Ign1 Ign2 Fuse Box Pinout

Jonathan Yarden
Jonathan Yarden
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Quick Answer

If you're dealing with the IGN1 and IGN2 fuses on a 2004 Lexus ES330, you'll be looking at the under-dash fuse box, which is located on the driver's side, usually protected behind a panel. These fuses are part of the ignition system, specifically controlling power to different ignition circuits.

The IGN1 and IGN2 fuses are typically 10 or 15 amp fuses. They ensure that your ignition system gets the required power to start and run your engine. If your car is having troubles starting or if certain electrical components aren't working, it might be due to a blown fuse in the IGN circuit.

  • IGN1 Fuse: Powers vital ignition components like the ignition coils, ensuring the engine is properly fired up.
  • IGN2 Fuse: Often connected to secondary circuits, might include things like accessories powered only when the car is in the "On" position.

Quick summary: Check these fuses if you're experiencing ignition issues. They are key to the engine start-up process and maintaining power to ignition-related systems.


Production years: 2004-2006. The Lexus ES330, including its IGN1 and IGN2 fuse box configuration, was part of the fourth generation ES series produced from 2004 to 2006.

Table Of Contents

Fuse Box Location

In the 2004 Lexus ES330, there are two main fuse box locations you’ll want to pay attention to: one inside the vehicle, and one in the engine compartment. Let’s look at each:

Interior Fuse Box

This is located under the dashboard on the driver’s side. It's typically covered by a panel you can easily remove by hand.

Engine Compartment Fuse Box

This is located under the hood on the driver's side, near the battery. It's housed in a black plastic box that’s easy to spot and access.

Understanding the IGN1 and IGN2 Fuses

The IGN1 and IGN2 fuses in your Lexus ES330 are related to your ignition system. These fuses play pivotal roles in powering up the electronic components needed for your car to start and run.

IGN1 Fuse

  • Location: Check the interior fuse box.
  • Function: Powers ignition-related electronic components.

IGN2 Fuse

  • Location: Also found in the interior fuse box.
  • Function: Distributes power to components that control engine management.

Fuse Box Pinout

Pinout can vary slightly depending on the vehicle configuration, but generally:

Fuse Name Fuse Rating (Amps) Function
IGN1 15 Ignition Power
IGN2 15 Engine Management
Spare - Spare Fuse Slot

Finding and Replacing Fuses

Replacing a blown fuse is straightforward: pull out the old fuse and push in a new one that matches the rating. Always ensure the replacement fuse has the correct amperage to avoid electrical issues.

Signs of a Blown IGN1 or IGN2 Fuse

  • The engine doesn’t start.
  • Electrical components related to the ignition aren't functioning.

If you notice such issues, checking these fuses for damage is a good first step. Look for burned elements or broken wires inside the fuse.

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