Originally Posted by
GVK.
If the fan works when he bridges the switch connector, then there is nothing wrong with the fan or it's wiring.
From what I remember with my RSTs (in the 90s so a long time ago)
the fan only used to come in about 3/4 up the gauge.
There used to be quiet a few different colour temp senders for CVHs, and if the wrong one was fitted the gauge would be inaccurate.
Yeah they do come on around 3/4s and i was going to say there are different colours of senders so i would definatly check this as my first thought was the sensor!
If you cant find the fault soon and need fans put in a manual over ride switch for now