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is this right - fan switch wiring?
omega0684 - 18/9/10 at 09:27 AM



cheers

rgrs - 18/9/10 at 09:42 AM

No, because the switch is in the wrong place.

Howver you need to establish if your switch is normally open and closes at it's hot temp or the other way around. As it will make a difference on the wiring.

Roger

flibble - 18/9/10 at 09:44 AM

quote:

No, because the switch is in the wrong place

Damn, where should it be then? Looks like how mine is wired up

r1_pete - 18/9/10 at 09:50 AM

Put the switch here, so you are using it to energise the low current coil in the relay, and the relay contacts handle the high curent requiement from the fan.
Image deleted by owner

Dangle_kt - 18/9/10 at 09:51 AM

whilst we are on the subject... does anyone have a diagram for the same thing but with a fan override switch, so you can turn the fan on and off from the dash, without needing the temp to get high enough?

r1_pete - 18/9/10 at 09:58 AM

Yes, just put it in parallel with the rad swich like this:

Image deleted by owner

omega0684 - 18/9/10 at 10:36 AM

quote:
Originally posted by rgrs
No, because the switch is in the wrong place.

Howver you need to establish if your switch is normally open and closes at it's hot temp or the other way around. As it will make a difference on the wiring.

Roger


its my understanding that the switch closes when reaching 95 degrees and subsequently supplies the fan with 12 volts

ken555 - 18/9/10 at 01:56 PM



Is how I had mine

Just add a switch a cross the temp switch for over ride

Or if you have a 3 terminal switch you can do dual fans




[Edited on 18-9-10 by ken555]

rusty nuts - 18/9/10 at 05:25 PM

quote:
Originally posted by omega0684


its my understanding that the switch closes when reaching 95 degrees and subsequently supplies the fan with 12 volts


It does, via the relay . In your original diagram the relay isn't doing anything