hi all just asking are ecus interchangable mines an h 4 for an 2.5 td estate my electrovalves are not working and after reading various posts realised that sport light dosent come on on switch on to confrm internal checks but doeswork on switch ive checked the 4 fuses and are ok ive also put on e-croftings kit with no joy ps iust say what an helpful and genuine man roy is he said if the kit didnt work he will work through the problem with me but i dont want to keep bothering him ive borrowed a multimeter and ive got no voltage coming out of eather yellow wires to which the kit attaches yours alan