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Omega Electrical and Audio Help / Re: Which sensor(s) control the cooling fans?
« on: 17 September 2009, 23:44:11 »
ok I'll check it out. Thanks again
Please play nicely. No one wants to listen/read a keyboard warriors rants....
QuoteThere are 2 temps, on UK petrols, its a single 3 pin sensor, on other cars it may be 2 seperate sensors.QuoteIf same as UK cars, there are temp switches in the rad. On UK petrol cars, this is a single dual temp switch mounted in rad just under top hose.
Does that make sense?
Yeah I've sen that sensor. There is one under the top radiator hose and one below it on the bottom of the radiator. Does it decide when the fans come on? Does dual temp mean it turns on the fans at 2 different temps? Like 1: when it needs to cool down a little and 2: when its overheating? Thanks for the quick response.
Again, on UK cars, the first setting is just above normal running temp, turns on fans at lowish speed. As temp approaches 100C (212F), it turns on fans at high speed.
From memory, these are normally open, so bridging with a paperclip will prove fan motors, relays and fuses. Slow speed fans can remain on with ign off, but I think high speed fans need ign on.
I have some UK wiring diags if you need to delve further
If same as UK cars, there are temp switches in the rad. On UK petrol cars, this is a single dual temp switch mounted in rad just under top hose.
Does that make sense?