Join Date: Mar 2017
Location: Brisbane Australia
I had similar issues which took ages to diagnose. I suspected the relay, I even bought another one. The pump would work every time I looked at it, I even pulled it out to test and also hot wired the relay. In the end I notice the pump not making a sound at one point, so I hit it and it worked... Turned out to be a faulty pump. Nothing wrong with the relay. As with anything electronic, things fail and often they fail periodically. Try testing the pump, ill bet thats what the issue is. I put a new pump and filter in mine and have never had another problem. Now I have a spare relay and in 30 years when this one fails im all set!
Alfa Romeo Spider and Cagiva Mito. Im a tragic for punishment!