Fans were working fine. now they have just stopped working could this be the switch or the fan loom. the fans still work on my manual switch.
any help would be good
cheers dave

 

Test switch by sticking it in boiling water (missus' blow dryer works too) with a DVOM that has a thermistor plug (or if you own a good thermostat)

Test circuit with a DVOM. Test relay and bypass relay circuit. Check wiring for melting at the fan.

 

As it still works when switched manually the circuit is ok, so just bridge the fan switch connector and see if it runs, if it does it is a duff switch, if not investigate further.
tabetha