I do such a thing however you are in MLB and I'm not.
what you are REALLY after is a GSM paging unit with a decent alarm. that is the same idea has what you have and the insurance company will like it
there is A LOT that can go wrong doing what you are attempting.
would strongly suggest getting it done properly if you can't work it out.
nissan use two systems on those and the driver and passnger doors are separate.
good you know where the module is go one better and take it out. that is a common problem with them. antenna dies of the unit s lose programming. if you have the instructions and the spare remote - rekey both of them to the unit.