2004 Lexus Es330 Ign1 Ign2 Fuse Box Schematic

avatar Jonathan Yarden

Quick Answer

To deal with the IGN1 and IGN2 fuses in a 2004 Lexus ES330, understanding the fuse box layout is essential. These fuses are part of the ignition system, which is crucial for starting your car.

The fuse box for the 2004 Lexus ES330 is generally located under the dashboard on the driver's side or in the engine compartment. The IGN1 and IGN2 fuses are often found in the engine compartment fuse box.

  • IGN1 Fuse: This fuse typically covers part of the ignition system that handles the initial power supply.
  • IGN2 Fuse: This often supports secondary ignition circuits, like maintaining power to components once the engine is running.

Both of these fuses are critical for the proper operation of your ignition system. If your car's having trouble starting, checking these fuses for any signs of damage or if they’ve blown can be a good first step.


Production years: 2004, 2005, 2006. The Lexus ES330, including its IGN1 and IGN2 fuse box schematic, was part of the fourth generation ES series produced from 2004 to 2006.

Table Of Contents

The 2004 Lexus ES330, like many vehicles, features a fuse box that houses various fuses for different electrical components of the car. Understanding the schematic of the IGN1 and IGN2 fuses is crucial as they play a role in the ignition system of your vehicle.

Fuse Box Location:

The primary fuse box in a 2004 Lexus ES330 is located under the dashboard on the driver’s side. There is also a secondary fuse box located in the engine compartment, which contains many critical fuses related to the engine's operation.

Identifying IGN1 and IGN2 Fuses:

When you open the fuse box cover, you will find a diagram or schematic that labels each fuse. Look specifically for the labels IGN1 and IGN2 as these are connected to the ignition system.

Fuse Box Diagram:

Here's a simplified way to look at the typical inside of your fuse box:

  • IGN1: Typically a 15 to 20 Amp fuse. This fuse is crucial for the initial powering of the ignition system when you turn your key to start the car.
  • IGN2: Also around 15 to 20 Amps. This one helps maintain power to the ignition system after you’ve started your vehicle.

Table of Fuses:

Fuse Description Amperage
IGN1 Part of the ignition system, powers the ignition switch. 15-20 Amps
IGN2 Works in continuation with IGN1 to keep the ignition systems operating. 15-20 Amps
ECU Electronic Control Unit, crucial for running the car’s computer. 10 Amps
FUEL Fuel Pump 10-15 Amps

Troubleshooting Tips:

If you’re facing issues related to the ignition such as your car not starting, you might want to check both the IGN1 and IGN2 fuses first. Ensure they are not blown and seated well into their slots. If either of these fuses appears damaged, replacing them could resolve your issues.

Enjoy diagnosing and fixing your Lexus ES330. It’s a rewarding experience when you can tackle these issues independently!

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