The first mod we did on our new 2013 GT project car was Webelectric’s plug-in 3rd brake light pulser for 10′-13′ Ford Mustangs. This is an extremely easy and fast install for those of you who aren’t really comfortable taking things apart. Simply remove the trunk lid liner and plug the small harness in. Simple as that! You can find the part on our store by following this link: Webelectric Brake Light Pulser for 10′-13′ Mustangs
First step is to remove the trunk lid’s felt liner. This liner is held on by a bunch of plastic clips, use the flathead to remove the clips gently as these will be used to replace the liner when the install finished.
After removing all the plastic clips, this is what you should see. Be sure to pull the emergency trunk release through the liner’s opening.
Next, remove the plug that powers the 3rd brake light.
Clip the pulser harness into the car’s plugs. You’re done!
Before reinstalling the inner trunk liner it’s a good idea to have someone put their foot on the brake to ensure the pulser is working properly. After you’re sure it’s working as intended, reinstall the trunk liner and the clips holding it on. Simple as that!
Below is an animation of how the pulser works. Please note that the light will only flash if you’ve been off the brakes for over 15 seconds as to not distract drivers in stop and go traffic or at a light.