Viper 791, 87 Cadillac Brougham

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=65584
Printed Date: May 13, 2024 at 8:12 PM

Topic: Viper 791, 87 Cadillac Brougham

Posted By: matt_attack
Subject: Viper 791, 87 Cadillac Brougham
Date Posted: November 04, 2005 at 12:23 AM

I just hooked up the 12v constant wire and my car wont start. I was doing just this one to make sure it would work and it didnt. Do i have to hook up all the rest of the wires or did i hook it up wrong? The constant from the battery went to the brain and then back to the factory constant. Help please. Thanks

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98 Cadillac Deville
Rollin stock 4 now

Replies:

Posted By: matt_attack
Date Posted: November 04, 2005 at 12:24 AM

Oh ya i also hooked up the ground wire cause i thought that might be the reason but its not.

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98 Cadillac Deville
Rollin stock 4 now

Posted By: Hornshockey
Date Posted: November 04, 2005 at 12:27 AM

have you hooked up your starter wires yet?

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Life moves pretty fast; if you don't stop and look around once in a while; you could miss it.

Posted By: matt_attack
Date Posted: November 04, 2005 at 12:29 AM

No i left all the factory wires the same i just ran the constant through the alarm. Do i need to run the starter through the alarm to get my car to start even though its still hooked up factory.

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98 Cadillac Deville
Rollin stock 4 now

Posted By: palouse md
Date Posted: November 04, 2005 at 10:27 AM

will it start with the key? the 791xv isn't going to start the vehicle w/o hooking up the ign., acc., starter, and bypass.

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MD

Posted By: matt_attack
Date Posted: November 04, 2005 at 3:21 PM

No it wont start with the key and all the other wires havent been touched just the constant.

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98 Cadillac Deville
Rollin stock 4 now

Posted By: pss5075104
Date Posted: November 04, 2005 at 5:13 PM

if yyou unhook the constant. will the vehicle work then.

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D

MECP First Class Certified Installer.

Nothing is impossable, it's just more expensive.

Posted By: matt_attack
Date Posted: November 05, 2005 at 1:24 AM

Yes if i unhook the constant from the alarm and hook it back up the factory way it works

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98 Cadillac Deville
Rollin stock 4 now

Posted By: matt_attack
Date Posted: November 05, 2005 at 4:58 PM

Can somebody give me a detailed illustration of how the wires should be hooked up the instillation book isnt that clear.

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98 Cadillac Deville
Rollin stock 4 now

Posted By: mo12v
Date Posted: November 05, 2005 at 5:08 PM

matt_attack wrote:

Yes if i unhook the constant from the alarm and hook it back up the factory way it works

What does " the Factory way " mean???

You are conecting the Alarm wires directly to the Vehicle wires and NOT cuting the Vehicle wires to run THRU the Alarm.....Correct?

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MO

Don't Learn from Others Mistakes
You Might Be the One That Knows.

Posted By: mo12v
Date Posted: November 05, 2005 at 5:11 PM

Constant 12 volts	RED	IGNITION SWITCH HARNESS
Ignition 12 volts	PINK	IGNITION SWITCH HARNESS
Starter	PURPLE	IGNITION SWITCH HARNESS
Dome Light	WHITE (-)	PIN SWITCH OR AT COURTESY LIGHT
Trunk Pin Switch	DARK GREEN (-)	INSTRUMENT CLUSTER
Parking Lamp	BROWN (+)	AT HEALDIGHT SWITCH *
Power Lock	LIGHT BLUE	DRIVER KICK
Power Unlock	BLACK	PANEL

Positive Pulse Door Locks.
* Wire Was Found To Be D GREEN At Headlight Switch In A 1987 Vehicle.

Accessories
Window Up	D\ D BLU P\ D BLU/WHT D\ D GRN P\ L GRN @ MAIN SWITCH
Window Down	F/ BRN F/ TAN R/ VIO R/ VIO/WHT
Ign Key Warn	LIGHT GREEN (-)	STEERING COLUMN HARNESS
Trunk Release	BLACK (+)	AT RELEASE SWITCH #231
OEM Horn	BLACK (-)	STEERING COLUMN HARNESS
Headlights	YELLOW (+)	HEADLIGHT SWITCH OR BEAM SELECT SW.
OEM Alarm Arm	N/A
OEM Alarm Disarm	LIGHT GREEN (-)	DRIVER KICK PANEL

Reversal Rest At Ground Power Window Circuit
Positive Pulse Trunk Release

Remote Start
Tach Signal	WHITE	AT DISTRIBUTOR *
Ignition #2	ORANGE	IGNITION SWITCH HARNESS
Ignition #3	N/A
Accessory	BROWN	IGNITION SWITCH HARNESS
Neutral Safety	ORANGE / BLACK (-)	ENGINE CONTROL MODULE
Brake Light	NO COLOR AVAILABLE
Reverse Light	LIGHT GREEN (+)	GEAR SELECT SWITCH
Rear Window Defrost	N/A

* Car Is Throttle Body Injection.

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MO

Don't Learn from Others Mistakes
You Might Be the One That Knows.

Posted By: matt_attack
Date Posted: November 07, 2005 at 9:43 PM

Okay it got it now just one more thing; the alarm has a purple wire thats for (+) output to starter circuit (starter side), a green wire thats for onboard starter kill (key side), and a WHITE/ blue wire thats for (-) remote start activation input. My question is which wire one of these wires do I tap into the purlple starter wire thats in the ignition harness?

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98 Cadillac Deville
Rollin stock 4 now

Posted By: Hornshockey
Date Posted: November 08, 2005 at 4:31 PM

You're gonna want to cut the starter wire in the factory harness in a place that allows you access to solder to both sides of the cut wire. Then hook up your starter leads from the alarm just how they are described, purple to the starter side of the cut wire, and green to the key side.

I don't want to discourage you, but it seems that you may be in over your head as this is pretty basic alarm wiring you're having issues with. Remote start installs go far beyond basic. You may want to consider paying a pro; he'd have it done easily in less than a day. Just a thought; good luck if you do decide to forge ahead and DIY.

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Life moves pretty fast; if you don't stop and look around once in a while; you could miss it.

Posted By: matt_attack
Date Posted: November 08, 2005 at 7:25 PM

Thanks for the help the way you explained it cleared it up for me I was overanalyzing it and making it harder than it really is. I hope to have it done by the end of the week. Thanks again.

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98 Cadillac Deville
Rollin stock 4 now