1996 Chevrolet Tahoe 3rd Ignition Wire Hook-up
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=5421
Printed Date: May 14, 2024 at 7:32 PM
Topic: 1996 Chevrolet Tahoe 3rd Ignition Wire Hook-up
Posted By: SCOTT105
Subject: 1996 Chevrolet Tahoe 3rd Ignition Wire Hook-up
Date Posted: November 13, 2002 at 5:04 PM
i would like to know how to hook up the third wire ignition to the alarm that i am using which is a prestige 750 remote start . the dealer said that i need to hook this wire up or esle my service engine light will come on. if i have to use a relay how would i hook it up. i beleive the 3rd ignition wire is brown.
Replies:
Posted By: PLAYER69
Date Posted: November 13, 2002 at 6:10 PM
There are actually only 2 ignition wires. One is Pink and the second is White. There is also accessory wire which is orange and the starter wire which is yellow. If you remote start does not have enough outputs you can hook up a relay like this:
85 - remote start - output while running
86 - First ignition wire ( pink )
87 - 12V+ fused. (red wire going to ignition switch)
30 - white ignition wire 87a not used.
Posted By: Chris Luongo
Date Posted: November 13, 2002 at 8:10 PM
I was about to say that your dealer is crazy, but I just found some tech info that says a third ignition is present in some models. Also, if you see a brown wire, that just powers up the radio---you don't have to worry about it. | ITEM | WIRE COLOR |POL| WIRE LOCATION |
| 12V|red |+ |ignition harness |
| STARTER|yellow or purple |+ |ignition harness |
| IGNITION|pink |+ |ignition harness |
| SECOND IGNITION|white |+ |ignition harness |
| THIRD IGNITION|pink/white *1 |+ |ignition harness |
| ACCESSORY|orange |+ |ignition harness |
| POWER LOCK|lt. blue |*2 |either door boot |
| POWER UNLOCK|white |*2 |either door boot |
| LOCK MOTOR|gray | |drivers door boot |
| UNLOCK MOTOR|tan | |drivers door boot |
| DISARM DEFEAT|tan | |passengers door boot |
| PARKING LIGHTS +|brown | |headlight switch |
| HEADLIGHTS|yellow |+ |headlight switch |
| DOOR TRIGGER|purple |- |headlight switch |
| DOME SUPERVISION|white |- |headlight switch |
| TRUNK/HATCH PIN|tied in with doors | | |
|TRNK/HTCH RELEASE|black or blk/wht |*3 |low in the drivers kick |
| TACHOMETER|white | |ECM *4 |
| SPEED SENSE|green |4 |ECM *4 |
| BRAKE WIRE|white |+ |at brake pedal switch |
| HORN TRIGGER|black |- |at column |
| WIPERS|purple |+ |steering column |
| LF WINDOW UP/DN|dk. blue - brown |A |at drivers door switch |
| RF WINDOW UP/DN|light blue - tan |A |dr door or kick panel |
| LR WINDOW UP/DN|dk. grn - purple |A |drivers kick panel |
| RR WINDOW UP/DN|lt. grn - purple |A |drivers kick panel | Notes:
Note: Diesel glow plug, dk. blue(+) located at the instrument cluster. *1 The pink/white does not exist on all models. *2 The 4 door versions are positive trigger, and the 2 door versions are 5-wire. *3 positive trigger on models with rear lift window, and 5 wire on models with cargo doors. *4 ECM is located on drivers side inner fender. Tach wire found in a black plug marked "white".
Posted By: PLAYER69
Date Posted: November 13, 2002 at 8:17 PM
That is really wierd. I must have done 100's of 95-98 trucks and not once have I ever seen a 3rd ignition wire. I doubt very much that yours will have this.
Posted By: Velocity Motors
Date Posted: November 13, 2002 at 8:59 PM
Check this out . Only use if the PINK/WHITE wire is present: https://www.the12volt.com/uploads/files/ign9596GMtrucks.gif
-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: PLAYER69
Date Posted: November 13, 2002 at 9:06 PM
Ah, now I know whats going on. On some GM trucks 95-98 the wire will be pink/white on one side of that big connector and white on the other. There will never be 3 ignition wires present just in some cases the wire will be pink/white instead of white depending where you get the wire.
The white wire powers up the transmission, speedo and tach.
I have a GM service manual here that confirms this.
Posted By: Velocity Motors
Date Posted: November 14, 2002 at 5:34 AM
 Sometimes ................... visuals help  ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: PLAYER69
Date Posted: November 14, 2002 at 11:45 AM
Sometimes ................... visuals help Yes they do! That why I think its time you post pictures of your Girlfriend 
Posted By: securinu
Date Posted: November 14, 2002 at 5:40 PM
could also be where the truck was built . older gm's have yellow or purple start wires also depended on auto or manual tranny as well.
Posted By: Velocity Motors
Date Posted: November 14, 2002 at 8:36 PM
..... " My girlfriend ?? Where did that come from ??
-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: PLAYER69
Date Posted: November 14, 2002 at 8:45 PM
Just kidding. Nevermind, ignore my sick and twisted mind.
Posted By: Velocity Motors
Date Posted: November 14, 2002 at 9:30 PM
------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
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