How to Install an Ignition Switch in a 1965-1966 MustangLast Updated December 4, 2023 | Bill Tumas
If you're having problems with the ignition switch cylinder in your 1965-1966 Mustang, consider replacing it with an aftermarket ignition switch. The ignition cylinders in many classic Mustangs are prone to falling into the off position after start-up. This causes your Mustang to abruptly turn off while driving. A new ignition switch assembly not only fixes that problem, but it's one of the best quality-of-life upgrades you can do to your classic Mustang.
If you're interested in a visual guide on how to replace the ignition switch in your 1965-1966 Mustang, check out the video below.
How to Install a 1965-1966 Mustang Ignition Switch
In this article, we're going to show you how to replace the ignition switch in your 1965-1966 Mustang. It's a relatively simple job that can be done by most home mechanics in under an hour.
- Small Pick
- Socket Set
- Socket Wrench
- Small Flathead Screwdriver
Step 1: Disconnect Your Battery
Before doing anything that involves electronics on your Mustang, disconnect your battery to ensure you don't damage anything or hurt yourself.
Step 2: Remove Ignition Switch Cylinder
Using your ignition key and a small pick, insert your key into the cylinder and then turn it to the accessory position. Then, insert the pick into the small hole and turn the ignition cylinder counter-clockwise past the accessory position. Finally, pull the ignition cylinder out of the ignition bezel.
Tip: Don't turn the ignition cylinder after you remove it. This makes reinstallation much easier.
Step 3: Separate the Ignition Switch from the Ignition Bezel
Reach up behind and grab the back of the ignition switch from underneath the dashboard. Push the ignition switch in and turn it counterclockwise to separate it from the ignition bezel.
Step 4: Remove the Ignition Bezel
Remove the ignition bezel. It should slide out of the housing easily.
Step 5: Remove the Ignition Switch
Pull the ignition switch out from underneath the dash.
Step 6: Remove the Retaining Nut
Now that you have access to the back of the ignition switch, use your socket wrench to remove the retaining nut found on the back of the switch. Then, slide the wire off the back of the rubber plug.
Step 7: Disconnect the Plug
Using your flathead screwdriver, carefully separate the rubber plug from the back of the ignition switch.
Step 8: Plug in the New Switch
Plug in the new switch by connecting it to the rubber plug you just removed the old ignition switch from.
Step 9: Reinstall the Retaining Nut
Reinstall the retaining nut with the socket wrench. Remember to reconnect the wire that you removed originally before tightening down the nut.
Step 10: Install the Spacer
Slide the spacer onto the new ignition switch to install it.
Step 11: Reconnect the Ignition Switch to the Ignition Bezel
Move the ignition switch back into place behind the dash and slide it into the bezel. Then, turn the ignition switch to lock it into place.
Step 12: Reinstall the Ignition Cylinder
Slide the ignition switch into the ignition bezel while making sure that it's in the same position it was in when you removed it originally.
Push it into place until it's properly seated and then turn it until it locks into place.
Step 13: Reconnect Your Battery
Now, reconnect your battery.
Congratulations, you're all done!
Ride around in Your 1965-1966 Mustang without Worry
After you've reconnected your battery, check to make sure you're car starts up okay, and then you're good to go! Installing a new ignition switch on your 1965-1966 Mustang is a great way to improve your driving experience. You'll never have to worry about your ride abruptly turning off while you're riding around enjoying yourself.
This process is simple and doesn't require any expensive tools. If you think installing a new ignition switch is right for you, don't be scared and try the installation yourself.