I don't know if it's similar, but on my 1986 SDL, there's a box on the upper front passenger footwell floor. There are a couple plugs going into it. I unplugged one of them to disable my alarm. One of them also disables the radio, so I plugged that one back in and unplugged the other. I've had no false alarms since then.

__________________
Chad
2006 Nissan Pathfinder LE
1998 Acura 3.0 CL
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

SOLD
1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
1985 300CD - Gladys