I am needing a little advice and direction.

I have just bought a Defender 90 and i am wanting to install my Alpine X100 head unit.

The connectors seem to connect together no problem as does the arial but there doesn't seem to be any power.

Do I need to connect the headunit somehow to the fuse box under the drivers seat to get it to work?

If so how do i go about doing this? is it easy to do? and what is the best route to take the wire? Do i need to disconnect the battery?

The badger.