Article

Installation Guide for 14-20 Toyota Tundra Headlights

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THIS GUIDE IS FOR​

ALPHAREX specializes in designing and producing superior and uniquely stylish aftermarket automotive performance lighting with unrival innovative technology. The following installation guide we take you through the installation of your new ALPHAREX HEADLIGHTS for your 14-21 Toyota Tundra step by step.

NOTE: Some vehicle require the DRL harness installed for the headlight to function properly.

Table of Contents

Disclaimer: This installation article is a tutorial guide. By reading this article, you agree it is for reference only and AlphaRex USA and its distributors make no guarantee on the finished results. Under no circumstances whatsoever shall AlphaRex USA nor its distributors be liable for any damage, misuse or personal injuries. If you do not fully understand the installation procedure, it is highly recommended that you seek help from professional mechanics to do the installation.

INSTALLATION TOOLS

1/4 Ratchet
Metal Panel Popper
Phillips Screwdriver
Flat Screwdriver
1/4 Extension
Socket
Size NEEDED
10mm

PART I - REMOVE HEADLIGHTS

DISCONNECTING THE NEGATIVE BATTERY TERMINAL

Whenever working on your vehicle always start by disconnecting the negative battery terminal.

FRONT GRILLE REMOVAL

Open hood and remove 4 X 10mm bolts on the top of the grille followed by the 2 plastic clips at the corners of the grille.

Remove the grille from the truck and set it aside to be reinstalled.

REMOVE BUMPER TRIM PIECE

Remove the 2 X 10mm bolts inside the wheel well.

Remove the clip located on the inside of the trim piece.

Please follow the same procedure for the other side.

Once the bolts and clips are removed, carefully remove the trim piece and set it aside to be reinstalled later.

REMOVE HEADLIGHT BOLTS

The headlight is secured with 3 X 10mm bolts, remove them with a wrench.

Lift up on the two top arms and remove the headlight from the truck.

Please follow the same procedure for the other side.

RELEASE THE WIRING HARNESS

Unplug the side marker headlight leveling and turn signal harness from the headlight.

Use the panel popper to release the wiring harness from the headlight.

TRANSFER TURN SIGNAL BULB AND SOCKET

Transfer turn signal bulb and socket to the new ALPHAREX headlights.

(For model with Sequential turn signal, please refer to the following additional steps)

  • Remove both side marker and turn single socket
  • Remove all sticker that covering the headlight opening
  • Insert the 2 wire pin into the side marker socket ,re-install the socket back onto the headlight
  • Install turn signal socket onto headlight , plug the grey color plug onto the socket , located the black plug and connect that to the turn signal wire from the truck.

PART II - INSTALL HEADLIGHTS

CONNECT DRL HARNESS

Prepare to connect the daytime running light harness with the red wire to the battery positive and the black wire to the battery negative or to the 10mm bolt of the fender grounding cable in order for the daytime running lights to function during the day.

TAP THE FUSE

Remove the fuse box cover and locate the IGN and add it to the fuse tap.

Crimp the gray wire from the harness to the fuse tap and reinstall the fuse box cover.

PLUG AND INSTALL HEADLIGHTS

Plug the sidemarker socket into the black connector and reinstall the turn signal socket and bulb onto the ALPHAREX headlight.

Connect the trucks low/high beam leveling motor and turn signal harness to the ALPHAREX headlight.

Attach the harness to the daytime running light connection on the back of the headlight.

Reattach the headlight wiring harness on to the ALPHAREX headlight.

Finish the installation by securing the headlight to the truck.

Please follow the same procedure for the other side.

TEST THE HEADLIGHT FUNCTIONS

Test the functions of your ALPHAREX headlights to ensure everything works properly.

ADJUST HEADLIGHTS LEVEL AND COMPLETE INSTALLATION

Secure all bolts and reverse the unistall process to complete installation. Next, aim the headlights at about 25ft against a wall on a level surface for headlights level adjustment.

Turn clockwise: to lower the light

Turn counterclockwise: to raise the light

Congratulations! you have completed the installation for ALPHAREX 14-21 Toyota Tundra Headlights.

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