How to Replace the Ignition in a Toyota Truck

Disconnect the truck battery's negative cable by loosening the cable's clamp nut and detaching the cable from the battery post. Set the cable aside somewhere where it can't accidentally touch the battery terminal.

Remove the under-dash panel on the left side of the truck by removing its four retaining screws and pulling it off. Detach the hood release cable by lifting the lever, removing the screws and disengaging the cable from the lever handle.

Remove the air duct that is below the steering column to access the ignition switch. Unplug the electrical connectors at the rear of the switch, remove the mounting screws with a screwdriver and detach the switch from the lock cylinder housing.

Detach the illumination ring by pulling out the plastic pin on the side. Turn the lock cylinder into the Accessory position with the key and insert a small screwdriver into the hole at the bottom of the ignition switch casting. Press the release bottom with this screwdriver as you pull the lock cylinder straight out.

Insert the replacement lock cylinder with its own key into the ignition switch casing. Make sure you insert it so the cylinder is in the Accessory position. Replace the illumination ring with its pin.

Mount the replacement ignition switch on the housing with its mounting screws and connect it to the electrical connectors.

Re-install all other components--the air duct, under-dash panel and battery cable--in the reverse order of removal.