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556U bypass module

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=33451
Printed Date: August 15, 2025 at 2:40 AM


Topic: 556U bypass module

Posted By: 12voltfan
Subject: 556U bypass module
Date Posted: June 07, 2004 at 10:33 AM

Does anyone know the esiest way to install this in a 2001 Grand Prix. Is it by using the antenna ring from the module on the ignition or by cutting the antenna off and hooking up to the Factory Tranceiver Module.
Also I was told that the 556U is the same as the 555U but just upgraded to work on European cars.



Replies:

Posted By: sroth140
Date Posted: June 07, 2004 at 12:59 PM
ive only used a 555U and it works great.  put the key in, run the antenna ring, connect to 12v and ground when running (status).  its very reliable and doesnt involve cutting anything so uninstallation is easy, the factory wiring is left intact.

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MECP certified installer



Posted By: 12voltfan
Date Posted: June 07, 2004 at 1:05 PM
How about the blue wire to the negative status output from remote starter. That needs to be connected too, right.



Posted By: sroth140
Date Posted: June 07, 2004 at 1:28 PM
what did i just type....  looks like its there...connect to 12v and ground when running (status). 

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MECP certified installer



Posted By: deviousjoker
Date Posted: June 07, 2004 at 2:25 PM

connect the blue wire of the 556u to the blue/white coming off the alarm...



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First Class MECP Installer


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