if you need the wiring diagram, let me know.

(p.s. a shorted wire wont cause a bulb to burn out, it will either blow the fuse if on the power side or nothing if on the ground side)
hear is the procedure to follow when replacing the bulb
Tail/Turn Signal Lamp Replacement (Except Stepside)
Removal Procedure
Ensure that the headlamp switch is in the OFF position.
Lower the end gate.
Remove the 2 screws retaining the tail/turn signal lamp assembly to the body.
Identify the bulb in need of replacement.
- The top bulb is a parking lamp and stop lamp
- The center bulb is a turn indicator lamp
- The lower bulb is a backup lamp
Turn the socket assembly.
Remove the socket assembly from the housing.
Installation Procedure
Turn the socket.
Lock the socket in place.
Install the tail/turn signal lamp assembly to the vehicle with the 2 screws.
Close the endgate.
Inspect the operation.
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