Hello,
I'm having a problem with the alarm. The car will start, run for about a minute and then stall out. After it stalls out it wont start. Disconnecting the battery and then reconnecting the battery will allow it to start run for a minute and then stall out again. I bought a SCT X3 to pull error codes to help trouble shoot the problem and received 1260. 1260 is theft detected engine disabled code. This makes sense to me because I got 2 false alarms over the last year when it was raining. It looks like the circuit shorted\failed. I'm capable of electrical troubleshooting, but it isn't my strong suit.
I'm looking for information on troubleshooting proceedures starting from the most simple of tests\ solutions and work my way from there.

I've done a little surfing... Is it true that the key fob comunicates with the vehicle in a 98 mustang?
I also would like to know how the alarm system was designed to work to help me understand what I'm doing. I know I'm asking for a lot. Any help is appreciated.