[Jaydee]

I have been trying to work out why my Haymens adjustable cooling fan relay starts vibrating when it reaches the right temperature. Sometimes the fans wouldn't come on at all. As soon as I wriggle the wires going into the sealed unit, the fans would start up. So I hot wired a switch into the relay on circuit, and the vibrating relay would stop and the fans stay on. Frustrating almost cooking the engine.
JD