Under the hood, outboard of the battery on the drivers side.

What is your question?

My alarm system acts irradically on my 1999 Chrysler Minivan.. I have tried using the key as instructed,to no avail. How can I disable the alarm system?

What makes this problem better or worse?

disconnecting the battery cable is the only way to stop the horn.

How long has your 1999 Chrysler Town & Country had this problem?

Two days