Accessory fan coolant switch

[LightningGSX]

You can test the sensor with some boiling water and a multimeter.It should read around 0 ohms at ~185 F and higher.You can test the rest of the circuit by shorting together the 2 wires going to the sensor.When shorted together, the fan should turn on

[FORSFED]

Thanks for the info Eric. I've tried looking everywhere. I'm assuming if 185 is 0 ohms then there must be some resistance when at room temp (figure I should maybe check this also...)? I was just thinking I could warm the car up to 185 and take a reading instead of taking the sensor out first. If it checks out ok, then I'll jumper the terminals at the plug to see if the fan turns on as you stated. I'll post up what I find out.

[LightningGSX]

It should be an open circuit below 185F.

[LightningGSX]

By 0 ohms, I mean its essentially a closed switch, in reality it may be above 0(and be fine), but the resistance should be low.

[FORSFED]

Gotcha. Well, I can't find my damn multimeter right now so I tested the fan circuit by shorting the two wires and the fan turns on, so I'm 99% sure that the switch/sensor is bad without even testing it unless there's something else I'm missing.

[LightningGSX]

Gotcha. Well, I can't find my damn multimeter right now so I tested the fan circuit by shorting the two wires and the fan turns on, so I'm 99% sure that the switch/sensor is bad without even testing it unless there's something else I'm missing.
Unless there's something preventing the sensor from reading coolant temp(coolant not circulating, etc), the switch is your problem

[FORSFED]

Thanks again Eric, if a new switch doesn't work for some reason, you might be hearing from me again.

[LightningGSX]

For future reference.