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On my f250 all my dash lights and prk lights come on when I step on the brake

(1999 Ford F-250 Super Duty)
in Potwin, KS on September 16, 2013
ive changed multi function switch, brake switch, light switch, unplugged entire bed and cab brake light and still does same thing. I'm confused on what else it could be
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of Greg's Orange Auto on September 16, 2013
something is feeding back thru brk light switch. maybe. quit throwing parts at it and get a diag and est from a mechanic
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on September 16, 2013
I am a mechanic sure. I have a spare sister truck but two Brown wires at light switch r spliced in with a brown write going into a harness
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