coolant fan

[jeramie stevens]

I took the fan out and straight wired I it. So I know it works. I’ve also removed the relay and put a jumper between the hot port and the oher port and the fan came on. I tried putting a jumper on the ect switch ( not he sensor ). But i’m not sure if I did it right because it didn’t do anything. I know that I can straight wire the fan to work, but I want it to work correctly. Can anyone tell me the correct way to jump the ect switch. I’m doing this to see if the problem is with the relay or the wiring in between.

Topic

[jeramie stevens]

My car is a 95 saturn s series. Btw.

[Edward]

Why don’t you just test the relay?

[jeramie stevens]

Thats what I thought I was doing by jumping the switch. Could you tell me another way to test it?

[Edward]

I’m a little confused about what you have done.

If you take the relay out you should have 4 wires going to the relay socket.

One should be permanent/ignition live. The Fat one
One should be Earth. A thin one.
One should be from the ‘switch’ a thin one.
One should be wired directly to the fan, Another Fat one.

Check you have a perm/ig live with a test light or multi meter.
Check you have continuity to earth with another.
Connect the Fat Live to the other Fat live. The fan should come on.
Plug in the test light to the thin live from the switch and the other end to earth. Start the car heat it up, the light should come on when the fan would have otherwise kicked in.

By doing this you’re checking all the wireing, if it all works out good then it can only be the relay.

It sounds long winded but takes a few seconds, apart from the heating up the car bit.

Obviously if the test light doesn’t light up when the car gets hot, look towards the ‘switch’.

Ed

[Author]

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