i have just bought a new car stereo for my 1998 Nissan Micra plus new iso leads, the new leads have a black wire with a o'ring connector on the end (is this the earth) if so do i need to connect this to the cars body work, hope you can help, Thanks
yes it is the earth lead you can attatch it to the car body work or if your cigar lighter is close use a scotch lock type connector and tap into the earth wire. hope this helps