Try the brake pedal switch for the two wires above the pedal box, also check radio wire, speaker power wire, glovebox lamp, ashtray lamp, seatbelt warning lamp and courtesy light group for the other wires.
You done all the heater box wiring have'nt you?
Do remember that the looms on these cars have loads of extra terminals, plugs, tails etc for use on options not always fitted to your car. Some of them may not go anywhere