Intermittent windscreen wiper issue


I've got a fault on my 1999 Fourtrak TDX where the intermittent windscreen wipers don't work and the blades also don't self park when turned off. The two continuous wiper settings work fine. I think the fault is caused by a small green relay box that controls these two functions but the issue I have is can't locate it on the vehicle as wiring diagrams don't help with a specific location. I've been told it's in the engine bay and others say it's under the lower dashboard of the steering wheel surround but neither areas have turned up anything. Is anyone able to help?