my04 just got it few months ago.. key fob lights up...no security light tests on startup. pretty sure it has the upgraded system because of compass rvm, but no module under center counsel. the plug is there but no module. is there another module somewhere? i think previous owner had aftermarket alarm cuz there is siren under hood with wires clipped. anyways just want to get factory alarm and keyless entry working again. have no idea where to start! anyone have any suggestions?