How to Install Fog Lights in a Toyota Corolla

Written by eli laurens
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How to Install Fog Lights in a Toyota Corolla
Toyota Corolla with yellow fog lights (

Installing aftermarket fog lights onto a vehicle is a simple improvement that could potentially save lives. By installing them on your Toyota Corolla, you'll find that driving on foggy nights will be a more pleasurable experience.

Skill level:

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Things you need

  • Fog lights
  • (1) 12-volt switch
  • 15 feet of 14-gauge insulated copper wire
  • Medium sized self-tapping screws
  • Screwdriver
  • Drill

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    Installing Fog Lights

  1. 1

    Locate a suitable position for the fog lights on the front of the car. A good mounting point is the underside of the bumper or into the recess of the lower air dam. Hold the light in different positions to know where it fits and looks best.

  2. 2

    Drill a hole smaller than the self-tapping screw into the mount point. It is not necessary to drill deeply; it is only to be a starter hole for the screw.

    How to Install Fog Lights in a Toyota Corolla
    Fog light and hardware
  3. 3

    Screw in the light bracket. You might have to remove the light from the bracket during installation. The bracket will have adjustable grooves to properly align the beam. Once the brackets are installed, the lights can be quickly removed or adjusted.

  4. 4

    Connect wires to the black, negative leads on the fog lights and locate a suitable place to ground them to the vehicle. Usually there are ample screws to ground to along the inside of the engine compartment. If there is no black lead, the mounting bracket will serve as the ground.

  5. 5

    Connect the red, or positive, wire of the fog light on the passenger side of the car to the red wire on the driver's side. Then splice a long segment of wire (7+ feet) from the driver's side light to the interior of the car. The positive leads from both lights should be connected to the wire leading inside.

  6. 6

    Install the switch. Locate a source of power, usually one of the fuse connections in the car's fuse panel. The long wire coming from the lights goes to the hot output of the switch, usually the lower of two or three contacts. If the switch has three contacts, then the top is normally the hot current input, the middle is the ground, and the bottom is the output. This extra ground is for the switch's illumination. Mount the switch in an out-of-the-way, but accessible, location.

Tips and warnings

  • If one or none of the lights illuminate, then check the ground wires for each light.
  • The ground for the switch is not required if a suitable connection cannot be found.
  • Disconnect the battery when working on a vehicle's electrical system.

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