New answers tagged fuse
Rather than the fuel pump relay/fuse, you could pull the starter relay/fuse. If the starter can't turn, the thief isn't going to kill your battery by cranking the starter until it dies. You could install a hidden button and connect it to the starter wire (between the ignition and the relay), so you need to press the button and turn the key to start the ...
Unfortunately, simply unplugging a fuse isn't going to stop a determined thief, as they often tow cars away rather than going to the noise and effort of trying to start them... I'd suggest some kind of physical lock, either on the steering wheel, gear lever/handbrake, or similar - they often act as a visual deterrent to casual thieves as well, who will go ...
It would help to know what type of car it is but on a petrol vehicle, a quick and easy solution is to remove the king lead from the coil (it's the one that runs to the centre of the distributer cap). No coil lead means no spark which on a petrol car means it won't start. Unfortunately this won't work on a Diesel as these don't rely on spark plugs.
There is no way that I know of which messing around with the fuses would cause your issue. I will assume at this point you replaced the fuse you moved to the tail lights, so this is not your problem. Sounds to me that there is a larger transmission problem happening here.
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