My rear wiper has been a bit reluctant to park & then sluggish while working. It has now stopped in the middle of the rear window & does not park or wipe. The symptoms point to the wiper motor (still available new from JLR for £255 or from Island 4x4 for £180 or as little as £12.99 used from a breaker) but is there anything else I need to consider. I have read that it's controlled direct from the BECM without a relay.