How to Replace an Ignition Switch on a 1993 Chevy S-10by Don BowmanUpdated November 07, 2017
Items you will need
3/8-inch drive ratchet
Set of 3/8-inch drive sockets
Set of small wrenches
The ignition switch on a 1993 Chevy S-10 is located on the steering column under the dash. It is a rectangular sliding switch and sits on the top of the column midway between the dash and the firewall. The switch has a curved bracket that conforms to the steering column and has grooves to allow it to slide for adjustment purposes. There is a rod that runs from the ignition key down to the switch. The rod has an L-shaped bend facing upward. The ignition switch has a hole in the bottom slider. When the switch is installed, the rod fits into this hole. The key pushes the rod up and down and moves the switch to all positions.
Remove the lower panel cover under the steering column, using the appropriate socket to remove the bolts. Remove the three 15 mm bolts from the steering column support bracket, using a socket. Allow the column to drop down to the point where the steering wheel is resting on the seat.
Remove the electrical connector on the top of the ignition switch. Remove the two small nuts on the left side of the steering column securing the ignition switch to the column, using the appropriate-sized wrench. Lift the switch off.
Install the new ignition switch by inserting the tip of the actuating rod into the bottom hole of the switch. While holding the rod and switch together so the rod does not fall out, lay the switch-mounting bracket over the two studs on the side of the steering column. Hold the switch so it does not come loose and install the two small nuts loosely.
Tighten the nuts on the switch bracket just enough to keep the switch from sliding. Place one hand on top of the switch and turn the key with the other hand. Turn the key to the "Run" position while sliding the switch until the dash lights come on, indicating the ignition is in the "Run" position. Tighten the small nuts to secure the ignition switch in place.
Turn the ignition switch momentarily to the "Start" position just enough to make sure the switch is adjusted properly. If it is not adjusted correctly, the starter will not engage when the key is in the "Start" position. Should this happen, loosen the two nuts enough to allow the switch to slide. With the right hand hold the key in the "Start" position and with the left hand slide the switch until the starter engages. As soon as this happens, release the key and tighten the nuts on the ignition switch. Try the key one more time to assure proper adjustment.
Raise the steering column. Screw on the nuts and tighten. Install the lower steering column cover.
Don Bowman has been writing for various websites and several online magazines since 2008. He has owned an auto service facility since 1982 and has over 45 years of technical experience as a master ASE tech. Bowman has a business degree from Pennsylvania State University and was an officer in the U.S. Army (aircraft maintenance officer, pilot, six Air Medal awards, two tours Vietnam).