03 Toyota Highlander

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=51914
Printed Date: July 21, 2025 at 11:38 PM

Topic: 03 Toyota Highlander

Posted By: x_creepin_x
Subject: 03 Toyota Highlander
Date Posted: March 14, 2005 at 6:23 PM

I am just simply looking for the alarm/remote start wiring codes for a 03 Toyota Highlander. I also want to know about any special place to mount a prox. sensor. I was thinkin center consol that's where I have done them before and have had no problems. All opinions are welcomed thx.

Replies:

Posted By: boomer_106
Date Posted: March 14, 2005 at 6:26 PM

Toyota

Highlander

2003

Remote Starter Wiring Colors and Notes
Function	Vehicle Color	Location
Start:	BLACK/ White (+)	Ignition switch harness
Ignition #1:	Black (+)	Ignition switch harness*
Ignition #2:	BLACK / YELLOW (+)	Ignition switch harness
Ignition #3:	red (Key Sense Wire)	***
Accessory:	Pink (+)	Ignition switch harness
Brake Light:	GREEN / WHITE (+)	Brake pedal switch
Tach Signal:	WHITE/ Green (AC)	In harness at the ECM**
Parking Lights:	Green (+)	Drivers kick panel
Headlights:	N/A
Diesel Glow Plug:	N/A
Clutch Bypass Wire:	N/A
Notes:	This vehicle is equipped with a Transponder Anti-Theft security system. Use Universal Alarm Bypass Module part # 2x402 where X can be any number. The Engine Control Module (ECM) is behind the glove box, it is the module to the left of the glove box. ** The key sense wire will measure 12 volts all the time till you place the key inside the ignition switch and the key sense wire will ground. Connect the WHITE/ black wire from the unit (ignition 3) to the wire and that will disarm the OEM factory alarm.

Toyota

Highlander

2003

Alarm and Keyless Entry Wiring Colors and Notes
Function	Vehicle Color	Location
Constant +12 Volts:	White & Blue / YELLOW (+)	Ignition switch harness
OEM Alarm Disarm:	Use key sense wire
Dome Lights/Superv:	Comes on with unlock
OEM Horn:	WHITE/ Red (-)	Steering column harness
Power Lock:	See note below	***
Power Unlock:	See note below	***
Trunk Release:	N/A
Alarm Input Wire:	Comes on with unlock
Notes:	***See Installation Note # 212 Modern Toyota Door Locks Diagram.

Posted By: x_creepin_x
Date Posted: March 14, 2005 at 7:52 PM

Thanks Boomer, this is a good start I appreciate the help.

Posted By: x_creepin_x
Date Posted: March 27, 2005 at 2:59 PM

Well I gave it a shot and well 1/2 of the wires and their locations are incorrect and the relay set-up from the notes was incorrect, U use a pink (unlock) and a pnk/blu (lock), and U aslo have to tap all the door triggers for each door seperately. Plus the factory disarm wire was nowhere to be found, I have been on this for 2 days and I just now got going on the remote start end of the install. I appreciated the thought and your help boomer, but this information was not helpful enough. But thx again