vz berlina cruise control, fuel gauge and brake light problems

[cooljb991]

hey guys,
tried installin a sub the other day with a mate and an electrician, didnt have enough time, so didnt get it finished, and when i turned the car back on, the brake light is always on even when the car is driving, the cruise control can be enabled but doesnt engage and the fuel gauge is stuffed, sometimes it shows how much fuel is there and then goes empty other times its says the car is just empty.

[Lumps of cheese]

Obviously you've upset something, go back over what you did and see if you've put something on wrong pr cut the wrong wires etc.