Cadillac STS

I have a 2000 Cadillac STS 4.9L with 87000 mi. The Traction Control light comes on and I get an error C1294 and U1301. I have no brake lights and the cruise control doesn't work. The high brake light has been out for about a month but the two outboard lights have been working fine until now. Brake lamp fuse is OK. Is it the brake switch or something more nasty.
April 22, 2007.

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