Freestar Anti Theft Alarm Issue

I'm having an issue with the anti-theft alarm on my 2005 Ford Freestar with a gasoline engine. There's an error stored, and the alarm isn't working at all. I've checked the battery, connections, and wiring, but I'm stumped. Anyone seen this before?

4 comment(s)

Oh man, that sounds familiar. I've got a Freestar as well, and I had a similar problem a while back. Is it possibly the alarm system coded to activate the optical locking? That was my issue.

Optical locking? Could you explain that a bit more? Are you suggesting the system is trying to use the indicator lights in a way that's causing the malfunction? What did you do?

Yes, exactly! The alarm was trying to signal via the indicators even when it shouldn't have been. Honestly, I messed around with it for an afternoon and just ended up taking it to my workshop. They were able to recode the alarm system and that fixed it. I would suggest going to a workshop and having them run a diagnostic on the immobilizer to see if that is the issue.

Thanks for the insight! I contacted my local workshop to run a diagnostic check on the immobilizer and alarm system coding. They identified that the alarm system was coded to activate the optical locking. A quick recode, and 45€ later, all is well! Your shared experience has been invaluable.

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