On my Mk1 with ABS there are actually what look like five relays on the mounting plate under a black cover. Three in front you can see and two hidden at the back against the inner wing which I couldn’t see at first. It was damn near impossible to get to the rear relays without unbolting the relay mounting plate…a bit fiddly but possible if you are lucky enough to have sockets of the right length to work around the ABS unit and the wiper motor. In common with other 5’s you then disconnect the relay marked HD22 which interestingly was the one furthest away from the bulhead…not the closest as normally seems to be the case. Now no dim dip. Great!