Hi hope someone can help, I had to rewire c90 plug in engine fusebox on focus 1.8tdci mk2 estate as had major wiring and fusebox meltdown, since doing so I keep getting fault code p0504, brake switch A/B correlation, also reverse light not working, if I put in reverse and press brake then reverse light works, does anyone have wiring diagram for C90 plug with wire colours or know what I've done wrong.  Many thanks. 

Thanks, all wires look ok so baffled, marked everything up when changing plug wires only one's i might have mixed up was 2 small black/blue wires, does anyone know if this would cause my issue, don't fancy damaging ecu.