Drop me a PM if you end up on that site, my user name there is "forbidden" or Jeff "Velocity Motors" and we will step you through the process. If the vehicle has factory remote keyless entry it is a negative trigger. If the unit does not have factory keyless entry it is a reverse polarity system that requires relays. Here is a link to the circuit diagram for a reverse polarity system. You will be able to pick up these wires in the drivers kick panel, up high IIRC.

http://www.bulldogsecurity.com/pdf/typec.htm
http://www.the12volt.com/installbay/detail.asp?info=alarm&year=1998&make=Ford&model=F% 20Series&ID=17813&type=Alarm

__________________
Forbidden Audio Ltd. (1995)
Rob Atkinson

MSN and E-mail - forbidden@telus.net

Eclipse / MB Quart / Digital Designs / Soundstream / Power Acoustik / Parrot / Pioneer / Pioneer Premiere / Kenwood Excelon / Morel / Focal / Scosche / EFX / MTX / Bass Slammer / Audio Control / Blaupunkt / ARC / Stinger / Streetwires / Metra / Pac Audio / Bassworx / JBL / Infinity / Compustar Pro / Audiovox / Clifford / Autopage / Fusion / CDT and whatever else you need.