1995 Oldsmobile 88 I was told? Short somewhere?

First: it was locking me in and the manual locks would not unlock.
2) I was driving in 5 lanes of traffic and the steering wheel went out along with the brakes. And the locks locked me in and I couldn't get out. Car engine continue to run. Once God stopped it for me. It sit for a while then went back to normal.
3) Today the horn that never have worked. Went off and refuse to go off. It ran for 10 minutes after the car engine was turned off.

Its been in the garage for 4 months they have searched the wiring one by one and couldn't find anything but a rusty wire in the battery cable. It would not do it for them. They have the wiring diagram for the car. The ignition switch been replaced, The security sensor in the steering wheel column been replaced. The ignition key been replaced twice ( has a chip in it.) The driver door switch been replaced since they thought that was the problem. The multi-function switch has been partly replaced. We have spent over $2000 on this car to trace the short. I want the car fixed! I even replaced the fading paint job on it the car is like a new one except for this stupid "can not find?" Short it has.

I am unemployed and this is my only transportation from the rural area I live in. Someone out there surely knows what wrong with it? The car been practically rebuilt the whole life of it. One little short is preventing me from driving it. Thanks for any answer that might solve the problem.