after a lot of faffing around in the rain it turned out to be the HRW switch playing up and breaking the circuit for both the amp and the HRW so now i have Fm and hrw working
only thing now is the drivers rear speaker is dead...wiring it fine all the way from the speaker to the ford equalizer/amp unit ....must be internal fault with the unit or sumwhere between the unit and the radio ??? hmmm