1984 Svo Mustang 3rd Brake Light Not Working No Power At Sockets

[KyleEBK]

3rd brake light not working on my 84 mustang spoiler,checked at the socket with dmm and no power there, how should i trouble shoot this and where does the wires run for the 3rd brake light? it does not have the original svo spoiler on it

the other 2 brake lights work fine, im pretty sure the 3rd brake light has never worked.

 

[02 281 GT]

1984 Mustangs weren't originally equipped with 3rd brake lamps (not until 1986). The required wiring for it may not even exist on your car unless someone has ran the wires for it or swapped in a later body harness. I would verify that the light is even wired before I did any further troubleshooting.