I need to replace my ignition switch on my 71' chevelle and have never done one. I know it is located near the brake pedal. How do I lower the steering column? The instructions with the new switch say to install it in the off-unlocked position the manual states to install in the lock position, which is correct? Could the ignition module be bad? I have replaced the stater,solenoid and battery cables but it will only crank intermittenly. The key cylinder works fine in all positions.