Doober said:Good points.
Someone tried to steal my '81 Malibu while I was at work in Flint, MI back in '06. The only thing I'd done was unplug the ignition coil, so he was a)in too much of a hurry, b)skittish, or c)too stupid to realize what was done. He didn't get the car. He'd jimmied the lock, I found out the following summer that as worn as a lot of these cars are, you can push the window in a little bit and you can fit just about anything down in the door... I used a tire iron because I'd locked my keys in the car, and I didn't break anything (yes, there's that much room). So part of my to-do plan is some sort of shield in the door shell so they can't simply jimmy the lock, and if anything they'll have to break the window to get in.
Something else you can do is build a latching relay and wire it to the power side of the ignition switch, not power to the coil itself. When it's wired this way it will require the key to be on, then you press the designated switch (you could use anything that has constant 12v to it) it provides power to the ignition. Then, after you turn the key off, it automatically breaks power to the switch. This way, even if they get into the car, break the column, disable the alarm, etc. etc., they still won't be able to start the car because there isn't power to the ignition switch itself. I was able to find a good diagram a while back, but I may have to build my own to show what I mean.
A power switch, for the ignition switch, which turns off when the car is shut off. A great suggestion Doober. It would work. The switch would have to be well hidden though.
I'm interested in a hidden switch, without having to switch off the starter or fuel pump. Why? Because I want to be able to remote start the car. The 555 big block is damn loud. I want to be able to remote start it and scare the shyt out of bystanders! But at the same time, if a thief gets in it, he should still not be able to drive off with the car. Anyone have any ideas?
Permanent line lock, on be default? Feasible? I'd like to know if there is a way to shut off the fuel pump if the brakes are pressed, unless I activate a hidden safety switch, if that makes sense.