First unhook the battery.
Pry off the trim plate that covers the center of the steering wheel, then use a 27mm socket on an extension to remove the steering wheel nut. Make sure any wires to the horn switch are unhooked, then pull off the steering wheel. There's a screw on the side of the lock cylinder holding it in. Loosen it and pull the lock out. The switch is on the back. There's a big plug connecting it to the wiring harness - don't worry, it only hooks up one way - and IIRC a screw or two holding it on, but as I remember the way to change them is pretty obvious when you see them.
You should buy the Bentley manual as the ignition switches have changed over the years.
With no key you will have to drill out the existing tumbler assembly from the switch in order to unscrew the ignition switch bezel.
Had the same thing happen on a '73 SB. It turned out (after much cussing) to be the ignition switch. Try replacing the switch with an OEM and "see" what happens!
You would have to drill out the center of the lock or have a locksmith pick the lock.
They twist left. They are a little hard some times to remove.
In a 1971 Super Beetle, the dimmer switch for the dashboard lights is typically located on the left side of the dashboard, just to the left of the steering column. It may be a small knob or a toggle switch that allows you to adjust the brightness of the instrument panel lights. If you're having trouble locating it, check for any markings or symbols that indicate its function.
To replace the ignition cylinder on a 1971 Oldsmobile Cutlass, first disconnect the battery to ensure safety. Remove the steering column cover by unscrewing the screws, then locate the ignition switch and cylinder. Insert the key and turn it to the "On" position, press the release pin to remove the cylinder, and then install the new ignition cylinder by reversing the process. Finally, reattach the steering column cover and reconnect the battery.
To remove the ignition lock cylinder on a 1971 Cutlass, first, ensure the steering wheel is unlocked and the key is in the "on" position. Locate the retaining pin or screw on the ignition housing, usually found on the underside of the steering column. Use a small tool to depress the pin while simultaneously pulling the lock cylinder out. Once released, you can remove the ignition lock cylinder completely.
Remove the steering wheel and lock plate then the turn signal switch and key reminder contacts, then a screw that runs right against the lock cylinder and pull it out. You need a puller for the steeering wheel and a spring compressor fot the lock plate available to rent at most parts stores,
The 1975 regular Beetle windshield will fit the 1971 Super Beetle.
Remove the steering wheel. When you do, you'll find the stalk is held in place with two screws.
The current records are 19 in a New Beetle, and 17 in a 1971 Beetle.