2008 Lexus IS250 Alarm/Remote Start/Stereo Wiring
Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=103587
Printed Date: May 07, 2025 at 11:27 PM
Topic: 2008 Lexus IS250 Alarm/Remote Start/Stereo Wiring
Posted By: hulign
Subject: 2008 Lexus IS250 Alarm/Remote Start/Stereo Wiring
Date Posted: April 01, 2008 at 8:06 AM
Looking for info...
these are the important items
12v
ign
a wire that can interrupt the vehicle starting
horn
thanks for any and all help
Frank
Replies:
Posted By: howie ll
Date Posted: April 01, 2008 at 11:38 AM
Ign wil probably be BLACK/ red, starter probably BLACK/ white; test.
Posted By: KarTuneMan
Date Posted: April 01, 2008 at 11:56 AM
| 12 VOLTS | Go to Battery | | | | IGNITION | Yellow | At Power Module (pin-35) | + | | | The Power Module is located behind the glovebox on the far right side |
| | IGNITION 2 | Lt.blue | At Power Module (pin-34) | + | | | The Power Module is located behind the glovebox on the far right side |
| | ACCESSORY | Green | At Power Module (pin-11) | + | | | | The Power Module is located behind the glovebox on the far right side |
| | STARTER | Blue | At Power Module (pin-15) | + | | | The Power Module is located behind the glovebox on the far right side |
| | STARTER 2 | Violet | At Power Module (pin-17) | + | | | The Power Module is located behind the glovebox on the far right side |
| | TACH SIGNAL | White | At diagnostic plug under driver's side dash | AC | | LOCK | blue | At switch assembly in driver's door | - | | UNLOCK | White (double pulse) | At switch assembly in driver's door | - | | DOORPIN | Violet or Pink | At driver's side Body ECU | - | | | The driver's side Body ECU is part of the fusebox under the driver's side dash. This wire is located in a 10-pin connector. |
| | TRUNK PIN | Green or Blue | At passenger side Body ECU | - | | | | The passenger side Body ECU is part of the fusebox behind the glovebox. This wire is located in a 28-pin connector. |
| | TRUNK RELEASE | Pink | At passenger side Body ECU | - | | | The passenger side Body ECU is part of the fusebox behind the glovebox. This wire is located in a 28-pin connector. |
| | FACTORY ARM | Arms with lock wire | | | | FACTORY DISARM | Disarms with unlock wire | | | | BRAKESWITCH | RED / black | At switch above brake pedal | + | | PARKLIGHTS | Yellow | In 28-pin plug on driver's side fusebox | + | | HORN | White | At top of steering column | - | | VSS WIRE | Blue | At Audio Amplifier in passeger side of trunk | AC |
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Posted By: howie ll
Date Posted: April 01, 2008 at 12:47 PM
There you go Gary, I was trying to be clever doing the previous model off memory!!!
Posted By: hulign
Date Posted: April 01, 2008 at 1:02 PM
Thanks Guys!!!
I don't have the car here yet but I knew it would be different than previous models. I'll post back and let you know if I let the smoke out of anything...lol
Frank
Posted By: Chris Luongo
Date Posted: April 01, 2008 at 6:52 PM
I've only done remote starters in these, but:
--At the driver's fuse box, there are a couple of thick constant-power wires.
--Also at the fusebox there are plenty of wires that test as ignition.
--Since the car can't be started without putting your foot on the brake, I would think if you just hooked up a "starter kill" onto the brake wire, that'd work.
Posted By: hulign
Date Posted: April 01, 2008 at 7:24 PM
Got it all handled....
Chris... You nailed it. I used large gauge wires by the fuse box for my hot(Black) and ign(blue) the (white) for the horn.
The "starter kill" we use is pretty low draw but I try for larger gauge wires whenever possible.
I don't trust how smart these cars are so I went to the module and interrupted the (blue) start wire. Went off without a hitch and no check engine lights.
Thanks all for the help!
Frank
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