Welcome to MUD.Hello guys i am a new member and happy to be here. I have a 1997 Lexus LX450
Please choose one thread to focus your questions in.Thanks so much for your advice, I'll let you know
You will want to drain and replace the differential fluid in front and rear axles. That water inside won't do them any good. Once you get it back up and running you will want to wash any and all salt water out from it. that might mean pulling carpet and cleaning too.The factory alarm is very easy to remove.
Pull the driver's seat out, under it will be a little black box. Now pull the DS kick panel so you can access the wiring.
Start tracing wires from the alarm to the where they connect behind the kick panel, and everywhere the alarm's harness is plugged in, unplug it and find the mating vehical plug and put them back together. The alarm is set up as plug and play except for the ground wire. That should be in a ring terminal screwed to a brace.