Mustang Scott Drake 3-Bulb Taillight Insert (1969) Installation Instructions

Tools Required:
  • Crimper
  • Phillips Head Screw Driver
Install Difficulty:
  • Moderate
  • Moderate Project
1. To start the installation of your new Mustang Scott Drake C9ZZ-STL-13400 3-Bulb Taillight Insert, remove the tail light cluster from the rear panel by undoing the four retaining bolts. The rear view of the cluster housing below shows the location of the bolt holes.
Mustang Scott Drake 3-Bulb Taillight Insert Install Image
2. Note the orientation of the Mustang taillight cluster and the 3-bulb insert below. The bottom end (right side of photo) has a more pronounced curvature than the top.
Mustang Scott Drake 3-Bulb Taillight Insert Install Image
3. Remove the rubber from the front of the cluster. Just pry it out gently.
Mustang Scott Drake 3-Bulb Taillight Insert Install Image
4. Remove the 6 screws that fasten the Mustang taillight lenses and chrome surround to the tail light body.
Mustang Scott Drake 3-Bulb Taillight Insert Install Image
5. Now you have access to the Mustang taillight body. Remove the stock bulb and note how the socket is secured by spring loaded prongs around its circumference.
Mustang Scott Drake 3-Bulb Taillight Insert Install Image
6. To remove the Mustang taillight socket just squeeze the prongs together and pull from the rear. Now you need to decide whether you are going to keep the body of the factory socket or just cut it off. I chose to maintain the factory look and just feed the wiring through, keeping the socket in place.
Mustang Scott Drake 3-Bulb Taillight Insert Install Image
7. Mount the Scott Drake 3 bulb insert into the tail light housing and feed the wires through the hole at the rear. Make sure you slide the side tabs of the insert underneath any seals so it’s properly earthed to the tail light housing.
Mustang Scott Drake 3-Bulb Taillight Insert Install Image
8. The three red wires are the connections for the tail lamp function of each socket in the insert and should be joined together. The other wires are for the turn signal/brake light function and are different colors for each socket. If you are not planning to use a sequential controller, you can join these three wires together as well.
Mustang Scott Drake 3-Bulb Taillight Insert Install Image
9. The red tail lamp wires correspond to the black wire in the factory socket. The turn signal/brake light wires correspond to the green wire in the factory socket.
Mustang Scott Drake 3-Bulb Taillight Insert Install Image
10. Re-insert the factory socket into the back of the Mustang taillight housing. Test your new installation before putting everything back together.
11. Repeat the process for the other side and you’re done installing your new Mustang Scott Drake 3-Bulb Taillight Insert.