2001 Mustang GEM problems
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=89127
Printed Date: May 13, 2025 at 7:08 PM
Topic: 2001 Mustang GEM problems
Posted By: lanman31337
Subject: 2001 Mustang GEM problems
Date Posted: January 17, 2007 at 6:49 PM
Hi, so I did a remote start on a 2001 Ford Mustang, and as we all know, it's got GEM. I double Dioded (diode at the door trigger, diode at the remote start end for the door trigger) and gem still keeps on tripping it. What am I missing?
Replies:
Posted By: profuse007
Date Posted: January 17, 2007 at 7:44 PM
gem module---- ->- ----door switch
door triiger input goes b/t that diode and door switch
diode isolate if more switches available
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Houston,TX
"The two most common elements in the universe are H+ and stupidity" (Ellison).
Posted By: lanman31337
Date Posted: January 17, 2007 at 8:35 PM
I have it like this:
GEM -----|-- ---- --|------ door trigger from remote start
I only have the driver's side door trigger hooked up because that's the only trigger hooked up on the remote start.
Posted By: profuse007
Date Posted: January 17, 2007 at 10:09 PM
just wire like above, diode faces the door trigger, aka ->|-.
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Houston,TX
"The two most common elements in the universe are H+ and stupidity" (Ellison).
Posted By: lanman31337
Date Posted: January 18, 2007 at 5:49 AM
I do, the one for the door trigger/gem itself has the stripe away from the GEM.
Posted By: Mike M2
Date Posted: January 18, 2007 at 6:41 AM
https://www.directechs.com/techtips/pdfs/resources/security/directed_techtips/1076.pdf How about the trunk wire? Did you isolate that too? ------------- Mike M2
Tech Manager
CS Dealer Services
Posted By: lanman31337
Date Posted: January 18, 2007 at 6:17 PM
I didn't hook up the remote start to the trunk at all, does that make a difference?
Posted By: NowYaKnow
Date Posted: January 18, 2007 at 10:02 PM
It sounds like you have 2 diodes inline on the same wire.. Did you actually CUT the OEM door trigger wire and put a diode inline on that? That is the only diode that matters in this case the other one is useless and not needed if your only hooking up the driver door. The diodes that you put inline with the cut wires isolate the gem signal, the other diodes on your door trigger wire just keep the seperate door triggers, seperate.
Mike
Posted By: lanman31337
Date Posted: January 19, 2007 at 6:51 AM
I cut the oem door trigger wire at the gem and put the diode inline.
Posted By: profuse007
Date Posted: January 19, 2007 at 8:28 AM
What the GEM is doing is that it send a very low voltage pulse back toward the door trigger. The diode is there inline to prevent it.
If you put a diode inline there and put your trigger-input on the right side of the diode, then there shouldn't be any false trigger occured.
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Houston,TX
"The two most common elements in the universe are H+ and stupidity" (Ellison).
Posted By: lanman31337
Date Posted: January 20, 2007 at 11:16 PM
[img]https://img267.imageshack.us/img267/9550/gem5ld.jpg[/img] That's exactly how i have it wired up, and it still says the door was open if i try to remote start after about 45 minutes.
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