best way is to take out speedo and then remove the little bulb then no more lights showing for mot most of the time its age of the wireing that becomes brital and couses a wire to bare and short go look at scrap yards sometimes your lucky and find a new one on a mot fail car i found 2 new rear shox and front disc and pads for the same price it would have cost for 1 rear shox so saved lots of money at same time put that ecu in your bag