Is there a way of testing it .Had a problem with the car over heating have rewired the loom and all was fine. Until last night the fans stoped working linked the wire fans came on drove home so assumed i needed new fan switch. Got one to day changed it and still the same problem. So thinking maybe the switch is fualty but dont no how to test
Thanks matt

 

have you checked the fuses yet?

 

The easiest way to test the whole thing is as you have done, bridge the two connectors that gon on the switch if it then works the fans the switch, is either not up to temp or duff.
For an accurate test drop in a saucepan of water na heat up with rad switch with wirea ttached to it's terminals and a multi metre, on a resistance setting, you will soon see it swing/buzz whne then contacts close as they do when up to temperature.
Are you sure you are letting it get hot enough, whne my sapphy is on the "N" it is only at 93C halfway through the N.
tabetha

 

what temp do the fans come in. It got to 96 and no fans

 

Should come on at 86C and go off at 77C, that is how my switch was marked.
tabetha

 

Is your switch standard tab

 

Yes, and was the same as the replacement one number wise and that.
I only have it there to plug the hole now, as don't use the switch.
tabetha

 

what do u use? mate

 

My fans come on at 93 go off at 86. Is that wrong please

 

93 86 is fine, just a big span so the fan is on a long time as opposed to cycling back and forth.
I use the ecu(aftermarket), set at ON at 90C, off at 87C, takes just under a minute to bring temp down when on to off, sat idling.
tabetha

 

Thanks. never timed mine but I know it doesn't seem to stay on all that long.
Paul