Right im going mad

i tried earthing the wire, but all it did was make the light brighter when i press the brake then and it doesn't stay on

Also now the lights behind the rev counter, speedo fuel injection light have gone of but sometimes come on depending on what wires i have conected. But even then they come on when i put the brake on. Im a bit stuck to be honest any ideas? or anyone have a wiring diagram?? Thanks Matt
PS im not saying what you guys have said is wrong im sure its something ive done