Brake/Stop Lights not working

[wingsnthangs]

As the title says, my brake lights fail to work, and I dont know when this started happening, just found out last night.

1. Checked fuses and fuse box under the left side of the dash, theyre OK.

2. Checked bulbs, they work too.

3. When my headlights are on, the rear bulbs are on, as normal. Nothing changes when I depress the brake pedal.

According to Chilton's manual diagram, there is a set of switches under the driver's side of the dash, including the stop light switch. However, I cannot locate this as when I take a look under the dash, it represents nothing like the actual diagram.

If i could locate that little switch, it may very well solve my problem. Or can the problem be something else? Can anyone help? Thanks in advance.