Any ideas would be greatly appreciated.

I've got a 96 Escort Cosworth that will not hold a charge in the battery, the fuel and temp guages don't light up, the heater blower and air con stopped working, the electric windows stopped working, and the stereo switches off briefly when I flash full beam, and the remote boot lock won't work either.

I've tried a new battery with no luck. Got the windows to work, but only by running a new earth directly to the window switch.

If I charge the battery, it'll start the car, but leave it overnight and it's not got enough charge to start it then.

This is driving me insane, can anyone help?