GT Concepts

2005-2006* Mustang
Sequential Plug n Play Tail Light
Installation Instructions
 
*For 2005-2006 Mustangs Built Before 11/05

Click Here For Print Friendly Instructions
 

Step 1

Verify that all rear lamps are functioning properly.

Remove the trunk rear trim panel by removing four push rivets: Lift out the center part of the rivet then pull the rivet out.

Remove two Torx retainers with a T-30 or flat screwdriver.
 

Step 2

Remove the three tail lamp assembly retaining nuts using an 11mm or 7/16" socket or wrench.

Beneath one of the nuts there may be a thin, flat assembly nut. Insert knife blade under assembly nut and pry apart. Insert screwdriver tip between gap and break assembly nut. Remove with pliers and discard.
 

Step 3

Disconnect tail light wiring harness connectors by pressing the locking tab then pulling the connector apart.
 

Step 4

Connect both ends of the sequencer module into the harness connectors. The connectors will only connect one way.

Step 5

Remove tail lamp assembly. Avoid paint scratches from the retaining studs.

Place the tail lamp assembly face down on a towel on top of bumper.

Remove the inner L1 lamp socket, turn counter clockwise then lift out.
 

Step 6

With a small sharp knife cut a 1/4 inch slit in the rubber grommet to accommodate the 3rd wire.
 

Step 7

Insert a pair of long nosed pliers through the slit to the opposite side of the grommet.

Grab the terminal end of the long red wire with the pliers and pull the wire through the grommet.
 

Step 8

Remove rubber gasket from the lamp socket.

Cut a slit in the gasket 1/2 way across to accommodate the 3rd wire.
 

Step 9

Insert the terminal into the empty slot of the lamp socket. Push in until fully seated.

Reinstall rubber gasket.
 

Step 10

Reinstall L1 lamp socket into the tail lamp assembly.

Reinstall tail light assembly. Avoid paint scratches from the retaining studs.

Repeat steps 2 through 10 for the other side.