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Unread 08-23-2013, 12:52 PM   #1
Gibby913
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1997 ZJ 
 
Join Date: Aug 2008
Location: NH
Posts: 246
Security System HELP!!!

Ok so I purchased a PCM w/ security ( because my jeep has red LED light on dash...)

I start Jeep up and a few seconds later it kills engine.....this leads me to believe it security related.

Thus I check to see if security is working.....I lock the doors with the power locks and leave window rolled down.

I then reach in window and open the door from inside. The alarm does nothing! No flashing lights, No horn, Nothing!!!

What's wrong with my security system and how do I fix it?

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1997 Jeep Grand Cherokee 4.0L I-6 150,600
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Unread 08-23-2013, 01:33 PM   #2
TKFlight
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1995 ZJ 
 
Join Date: Jun 2013
Location: , PA
Posts: 42
I'm not sure if this would help you in your situation, but I had a similar situation. My little brother set my alarm off went out and tried to get it started up. It wouldn't even start when you turned the key, it would sound like it was about to start up then just shut off. What I did was had someone take a spare key, put it in the passenger door and turn it and as they turn the key go in and start it up.
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Unread 08-23-2013, 01:42 PM   #3
Gibby913
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1997 ZJ 
 
Join Date: Aug 2008
Location: NH
Posts: 246
Unfortunately mine will actually start but dies after a few seconds.....I'll give it a try but I feel as if it wont work in my situation But I appreciate your suggestion! I'll keep you posted on if it works......
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Unread 08-23-2013, 01:46 PM   #4
sebian
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1995 ZJ 
 
Join Date: Sep 2009
Location: Austin, TX
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Should be able to disarm the system by unlocking the tailgate or passenger door with the key. That trick has worked for me.
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Unread 08-23-2013, 01:49 PM   #5
Jeeples
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2000 WJ 
 
Join Date: Jul 2006
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Posts: 4,302
New reman'd or used PCM?
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Unread 08-23-2013, 01:52 PM   #6
jetjr91
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1995 ZJ 
 
Join Date: Aug 2011
Location: E. Palo Alto, california
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^^ yup I didn't even know I had an alarm til a year and a half after I had my jeep it just went off out of nowhere. Unlocking the tailgate or passenger door with the key disarms the alarm. Actually unlocking the driver side door does it too but on most zjs that side wears out and stops working.
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Unread 08-23-2013, 01:57 PM   #7
Gibby913
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1997 ZJ 
 
Join Date: Aug 2008
Location: NH
Posts: 246
Its a JY PCM and is security enabled......The issue I believe I'm having is that my Jeep's security system for whatever reason doesn't work despite it has a factor LED light on dash....no blinking of light, alarm wont flash under any conditions....

Is it possible that because my alarm isn't functioning that this new PCM is cutting the engine because it cant sense the security?

If so how do I fix the security? Thanks all for your help thus far.....Im truly thankful....and unfortunately still stumped!
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Unread 08-23-2013, 02:21 PM   #8
Jeeples
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You need a non-security PCM.

The issue is that the JY PCM is seeing the wrong security code from your BCM and not allowing the vehicle to stay running. When you get a non-security PCM and install it in your ZJ, your BCM will 'marry' itself to that new PCM.
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Unread 08-23-2013, 03:20 PM   #9
Gibby913
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Awesome! I'll order one ASAP and let you know if that fixed it! Thank you for your advice!!!! I pray to god this will work.....
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