2003 tacoma, viper 5901

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=127509
Printed Date: October 31, 2025 at 1:38 AM

Topic: 2003 tacoma, viper 5901

Posted By: matthew210
Subject: 2003 tacoma, viper 5901
Date Posted: May 31, 2011 at 6:42 PM

I had an older viper remote start installed, and had no issues, but I'm a little confused about the ignition harness wiring for the 5901.

My truck has the following wires into the ignition harness:

12 Volt White and WHITE/ Red

Starter Black

Ignition 1 BLACK/ Red

Ignition 2 BLACK / YELLOW

Accessory Blue/Red

For the 5901, I understand I will connect violet to the starter side of black, and green to the ignition side of black. No issues there. I also know I will connect H3/3 (orange wire) to my accessory wire (blue/red).

I'm confused as to which wires go to the 12V constants, and which go to ignition 1 and ignition 2. I'm guessing that the following wires require 12V constant in:

H3/2 RED / White (Flex Relay Input)

H3/6 Red (ignition 1 input)

H3/9 RED / Black (Accessory/Starter Relay Input)

And for my ignition 1 and 2:

Ignition 1 H3/1 Pink (Ignition 1 Input/Output)

Ignition 2 H3/7 Pink/White (Flex Relay Output)

Does all this sound correct? If so, is there any need for the H3/8 Pink/Black wire (87a Flex Relay Input). I think it's the flex relay idea that has me confused. Thanks for any input.

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Matt

Replies:

Posted By: kreg357
Date Posted: May 31, 2011 at 7:44 PM

H3/7 is not used. Factory default programming is Flex Relay = IGN2. Should be good to go. posted_image

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Soldering is fun!

Posted By: matthew210
Date Posted: May 31, 2011 at 8:10 PM

I apologize, but did you mean to say H3/8 is not used? Everything else I mentioned seems correct? I really appreciate the fast response.

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Matt

Posted By: kreg357
Date Posted: May 31, 2011 at 8:59 PM

Yes, H3/8 Pink/Black is not used. Sorry, for the typo / confusion. Everything else looks fine, you have a good handle on it.

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Soldering is fun!

Posted By: kgerry
Date Posted: June 02, 2011 at 9:50 AM

just make sure you power ALL 3 red primarys... Red, RED / White & RED / Black.... and you should be good to go....

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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer

Owner/Installer
Classic Car Audio
since 1979

Posted By: matthew210
Date Posted: June 04, 2011 at 10:39 PM

I have a 2003 Toyota Tacoma and I am in the process of installing a 5901. I had a different Viper remote start before, and there was one thing that always bothered me that I was hoping to correct when I installed the 5901. I always leave my headlight switch on, and the lights turn off when I open the door. The issue is if I remote start my truck, my headlights turn on automatically. If I let the remote start time out, or if I shut it down from the remote, the headlights stay on because there is no door trigger. I did a search on here, and found a post where it mentioned using the factory alarm arm output wire to the door trigger to shut down the lights.

If I did this, would it set off the alarm, or would it ignore it because it happened at shutdown?

If my door trigger is negative, can I just connect straight to it, or would I need a relay for some reason?

Thanks in advance for your help.

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Matt