I have td5 disco having problem with abs previously changed front drivers side hub and sensor back a couple of years ago and then changed the sensor as it showed electrical failure and changed rear passenger hub as I have had an occasional issue with that one for a few years but became more regular recently had a mechanic check it out on the road with diagnostics and he thought abs ring maybe issue so changed that but still getting electrical failure on the abs on both wheels does anyone have anymore advice on where to check.thanks