Begin by removing the retaining ring at the top of your 1993 Nissan Quest ignition switch. Slide the ignition barrel out. Remove the wiring harness from the end of the ignition barrel. Reverse the process to install your new ignition switch.
You will need to remove the ignition switch retaining ring. Pull the ignition switch barrel out. Remove the wiring harness from the back of the ignition switch. Reverse the process to install the new ignition switch.