Astrochart for 2003 GrandAm
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=23995
Printed Date: July 17, 2025 at 2:25 PM
Topic: Astrochart for 2003 GrandAm
Posted By: pederson_j
Subject: Astrochart for 2003 GrandAm
Date Posted: January 05, 2004 at 5:59 PM
I am installing a 2100 Astrostart in my 2003 GrandAm and I am trying to find the Astrochart, if anyone could help me it would be appreciated.
Replies:
Posted By: jrilla
Date Posted: January 30, 2004 at 8:24 PM
Did you find what you are looking for? Do you mean you want the installation guide or the wire information for the Grand Am?
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J Rilla
Owner/Installer
Posted By: pederson_j
Date Posted: February 01, 2004 at 11:38 AM
I have not found what I need, I went to a local dealership and they told me it is the white wire on the top of the motor, but I have tried that wire and when I try using the astrostart it turns over, but does not start, then I get an error code for no tach input.
Posted By: jrilla
Date Posted: February 01, 2004 at 1:14 PM
Hmmm, so I am guessing you are looking for the tach wire.
You need to test the wire before hooking up to it. It should read between 1 and 6 volts AC and increase when the gas is pressed. If you have a 3.1 L engine try a PURPLE / white wire.
It sounds like the problem is not the tach wire though, since the car would start regardless of whether or not the AstroStart saw the tach signal. the tach is just used to tell the unit when to disengage the starter. So your problem could be the passlock bypass. What bypass method did you use? Take a look at the security light on the dash during a remote start attempt. If it flashes then you have a problem there. You might still have a problem though even if it doesn't flash.
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J Rilla
Owner/Installer
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