The alarm processor / RAP Module is on the firewall behind and above the e-brake pedal. It's a grey box, mounted up high (you have to lay on your back looking up with your head by the brake pedal to see it). It's difficult to trace the leads, you need a good color coded schematic to figure it out. If it was a dealer installed or aftermarket item it could be anywhere, but that's still the most common place for it. Hope that helps...