Switch on MIJ Tele TL52-55

My latest addition is a mid 80's TL52-55. Fit and finish are very nice but the sound is a bit dull. The bridge pup is especially flat and devoid of twang.

The switch is a 5-way which is wired backwards so that with the switch towards the neck the bridge pup is active.

Am I correct is thinking this guitar came with a three way switch? What wiring diagram should I use to get it back to factory spec?

Thanks

Mine had a 5-way (the well-known DM-30 of 80s MIJ Fenders) - these guitars are not "52 reissues" in the sense that they copy all details of the 1952. They use slothead screws and single ply guards, but aside from playing divinely they are not specifically intended as replicas.
Mine was wired the right way round though.
It had been previously messed with to install a humbucker, but I put that right (along with a proper switch, the DM-30 was crap).
http://farm3.staticflickr.com/2729/4480845945_7d20562955_z.jpg

Thanks for the info Matthew. I'll check mine tonight.

Yeah if you're not worried about keeping things original I'd recommend an oak grigsby/Fender 3 way switch or a CLR. If you want to keep it original, those old DM-30 switches are available on ebay, I bought one for my '85 MIJ Paisley tele because it is in mint condition and I wanted to keep it as close to original as possible.