791XV in 96 TA remote start issue
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=28782
Printed Date: August 10, 2025 at 12:03 PM
Topic: 791XV in 96 TA remote start issue
Posted By: Puddy905
Subject: 791XV in 96 TA remote start issue
Date Posted: March 21, 2004 at 1:32 PM
Hey all, Seems my last post died off a little. Anyways I resolved mnay of the little problems with my new Viper 791XV in my 1996 Trans Am, but now I'm having curious problems with the remote start. Basically when you actiavte the remote start, the vehicle powers up, the starter moves into position, but it doesn't crank. When you put the key in the ignition, it starts, but then shuts down right away....when you put the key in and turn it to run, it starts, stays running, but then keeps trying to crank. I have connected the Pink Ig1 wire, the Purple wire to the starter wire, the tach wire to the pcm, the orange to Accessory, the factory disarm H2 gr/blk to the VATS relay, and so on. The only wires I didn't connect were the green onboard starter kill wire (I'm kinda sceptical on cutting the starter wire and relying on the alarm to always make that connection) and the pink/white ignition 2 wire (this wasn't connected before with my OMega remote start module). When I run the car, and try the tach learn sequence, that doesn't work either. Any recommendations or suggestions?!!? Thanks :D PS. Also wondering where to hook the ground wire on my second radar sensor to?? (So it would be grounded when armed)
Replies:
Posted By: Velocity Motors
Date Posted: March 21, 2004 at 4:30 PM
You need to attach the ground out when running wire tot he VATS bypass ( ORANGE P12 harness ). The car will not start unless your tach wire is properly learned to the system. For the radar sensor trigger, you can use the ORANGE / BLACK wire for the ground when armed.
------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: minh955
Date Posted: March 21, 2004 at 9:08 PM
hi Puddy905 im get sam your problem ,i m change feature#3 #3-2 engine checking voltage is work good ,i m not connet green wire sam you ,
Posted By: profuse007
Date Posted: March 21, 2004 at 10:30 PM
-ill second that antitheft system, VATS, for ur problem.
-the green wire- i think if you hook it up correctly, then theres no concern that it wont work properly.
------------- Houston,TX
"The two most common elements in the universe are H+ and stupidity" (Ellison).
Posted By: minh955
Date Posted: March 21, 2004 at 10:34 PM
Profuse007 are you vietnamese
Posted By: sroth140
Date Posted: March 22, 2004 at 12:26 AM
take the green to the key side and purple to starter side... thats how starter kill relays have been for years. remember, alarms are not ment to keep your CDs and radios from being stolen. they are ment to keep the vehicle from being stolen. thats what the starter kill does. also, you are throwing away another feature, the green and purple wires act as your anti-starter grind circuit. when the car is remote started, only the purple wire has voltage, so if you crank the key, you wont hurt the car because the green wire wont let the signal pass. as for the crank problems, go back over the vats relay and resistors. make sure you are using the right resistor values. as far as over cranking, when the brain is set for voltage sense, itll only crank its programed amount of time. i think default is .6 seconds. ------------- MECP certified installer
Posted By: Puddy905
Date Posted: March 22, 2004 at 7:42 AM
I've got it set on tach sense, but I can't get it to get learn the tach. I wil hook up the purple wire and try that, to see if it resolves the anti-grind problem. As for the VATS, I was told to use the gr/blk factory disarm wire....is this wrong?? Which wire is the P12 orange wire? And which harness is the ORANGE / blk wire for the ground when armed for the sensor?? thanks guys/gals
Posted By: Velocity Motors
Date Posted: March 22, 2004 at 8:05 AM
There is only one ORANGE / BLACK wire on the module. It's the P7 harness right next to the P12 harness. As for the ground when running, I made an error and you should be using the BLUE/WHITE wire from H3/1 or the wire that you stated for the OEM alarm disarm.
------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: Puddy905
Date Posted: March 22, 2004 at 8:10 AM
That's where I have it hooked up, to the H3/1 factory disarm wire, which sends a negative pulse when the remote start is activated. I'll give the rest a try and see what happens. Thanks Jeff.
Posted By: chriswallace187
Date Posted: March 22, 2004 at 9:12 PM
You need to use the status output wire instead of the factory disarm wire. The factory disarm only provides a negative pulse at the moment the remote start is activated, whereas the status output stays grounded the entire time it's running.
Posted By: Puddy905
Date Posted: March 23, 2004 at 7:47 AM
Ok, which one is the status output? Is it a -ve output? So hopefully, if I hook that up, along with the green wire for the anti grind, I should have made some progress.........lets hope! lol
Posted By: sroth140
Date Posted: March 23, 2004 at 12:02 PM
its a (-) trigger, there are two you can use on the new DEI products. there is one blue/white wire on the same harness as the brake shut down input (brown), and there is a harness that plugs into the relay pack with leads for 2nd ign, accy, and starter, the blue wire there is status too.
------------- MECP certified installer
Posted By: Puddy905
Date Posted: March 23, 2004 at 1:14 PM
OK, I'm gonna go over everything, but here's how I've got it, for my 96 trans am Heavy harness = Purple, starter side...green key side of starter wire (yellow on car) Orange to accessory Orange on car Pink/White to ign 2 Brown on car Pink to Ign 1 Pink on car 4 pin harness on satellite: Blue (-) status ouput to VATS relay On H1 Harness: RED / White (-) 200mA ch 2 to Trunk relay Brown (-) to siren Blue (-) trunk trigger to ORANGE / Blk at BCM blue connector Green (-) door trigger Orange ground when armed OUTPUT to black wire of second sensor (radar) H3 Harness (5 PIN): Blk/White to toggle switch (automotactic so didn't use neutral safety...works fine) Violet/Wht to tach input at White wire on PCM (looked up connector spot 13) Brown (+) brake input to white at brakes Grey to hoodpin And basically that's all I have hooked up. I have tested all of the alarm, except for the sensors, since I don't have them hooked up yet, and everything's working fine, it's just the remote start I have to change around, and hopefully if these connections look ok to everyone, then it should work!! Aaron
Posted By: sroth140
Date Posted: March 23, 2004 at 8:45 PM
H3 Harness (5 PIN): Blk/White to toggle switch (automotactic so didn't use neutral safety...works fine) that needs to be hooked up with a toggle switch to ground to complete the remote start circuit. you take that to a toggle switch to break the ground. say if a mechanic needs to work on the car, with the switch off the car cant start. when you engage the remote starter with out that wire grounded, the circuit doesnt exist, you need that to complete it. ------------- MECP certified installer
Posted By: Puddy905
Date Posted: March 24, 2004 at 7:42 AM
That's what I did. And it works fine.
Posted By: Puddy905
Date Posted: March 29, 2004 at 7:48 AM
Ok...now I'm getting a little frustrated....I tore the remote start satellite out, and rewired the entire thing, making sure everything was connected to the right wires, and done properly. Now, when I hit the remote start, it cranks, starts, then shuts down. Now, I checked the VATS relay, and everything's wired right, I used the Blue status wire on the satellite to activate the relay. I STILL CANNOT get the system to learn the tach! Will the unit shut down after starting because of the tach learn? or is it 2 problems I'm dealing with (tach and VATS). This is really getting frustrating. BTW hooked up both sensors, and I am really impressed with how well it works and the quik response on the remote!!
Posted By: Velocity Motors
Date Posted: March 29, 2004 at 9:28 AM
Place the key in the ignition and try to start the TA. If it starts with the key in there then it's a VATS problem. If it doesn't start then it's a tach problem.
------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: Puddy905
Date Posted: March 29, 2004 at 11:20 AM
It does the same thing with the key in the ignition, starts and shuts down right away. If I put the key in the ignition and turn it to run (not start) then hit the remote start, it starts and stays running, but then tries to start again (not sensing the tach). This is why I question whether or not it's the VATS. (before I had the VATS hooked to the right wire, it wouldn't crank at all, if I put the key in, it would, but not stay running). I'm thinking there may be an all together different issue?!?
Posted By: Puddy905
Date Posted: March 29, 2004 at 11:22 AM
Has anyone done a tach learn with any system on a 96 Trans Am?? I just wired into the PCM.
Posted By: chriswallace187
Date Posted: March 29, 2004 at 1:53 PM
Did you test the tach wire for ac voltage that changes with engine RPM? Everything you've described now sounds like a tach signal problem; and on GM's PCMs there are always like 5 white or PURPLE / white wires and it's pretty easy to pick the wrong one. Usually you can just hook the tach signal up to the uncommon wire at any fuel injector and learn that.
Posted By: Puddy905
Date Posted: March 29, 2004 at 2:19 PM
Sounds like an idea. I'm sure it's the right wire, I checked the proper colour connector, and socket #, it was Blue 13 or something, there are 3 white wires on every harness at the PCM, so I knew to check for the right one. There is voltage at that wire, but it's not working......I'll try the injectors.
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