Alarm went off, now car won't start!!! HELP!

[dancinmeg21]

This car has been nothing but problems....I have a 1992 SC300...long story short, someone tried to steal this car and sell it for parts, and they messed up the security system because they decided to start cutting random wires. So somtimes whenever I lock this car, unlock it to get in, the alarm goes off and I can't start the car for a few minutes (I turn the key in ignition to start, and nothing happen, no clicks or anything). I go around back and forth to passenger door and driver side door and lock and unlock and eventually I can start the car.

Two days ago, I unlocked it from the passenger side and the alarm went off. Tried everything, looked on here for people with similar problems...nothing is working! Even unhooked the battery for 10 minutes!

The only thing I am doing that is different than the times I have been able to get it to work is that I do not have the master key, just a copy of it. Does the master key have a chip or battery in it? My master key had no remote or anything special to it, just a normal key. Unfortunately, its lost. 

So my theory is, that I need the master key for this right? Any other suggestions? 

[TrevC]

Hi Megan...welcome to the forum

I held back from responding straight away as I thought that someone might have had this problem before.

It sounds like the system has poor wiring as a result of the break in. I think the first place I would start is to check the damaged wiring to see if there is a fault there. Also, check the door switches are working...do the interior lights come on when the door opens, etc.

The key issue doesn't seem to be a problem as the car does run, meaning the immobiliser system and key are communicating. The only reason for the master key is to get another one duplicated from it if needed. Otherwise any other key used that allows the car to fun is fine.

Let us know how you get on with it

Cheers,   Trevor