Coolant temperature sensor help...

[biscuitnd]

Yes, I've searched.

I'm having trouble finding the temperature sensor on the 540 motor.
NOT the one of the temperature "switches", the temperature "sensor".

I need the switch that drops voltage according to the coolant temperature. Probably the same one the OBC / dash guage use.. but I can't find it.

Thanks for your help.

[fifthand]

There are two. I think the one you are looking for is mounted on the thermostat housing. If not, it could be the one on the radiator. Someone else may know for sure.

[applecran]

Yes that is correct, two, one on the thermostat housing and one on the lower rad by where the expantion tank is.

[biscuitnd]

The one on the rad is a 'dual temperature switch'. I'm not sure about the one at the thermostat housing.

[biscuitnd]

I could figure it out with a multimeter, but that literally requires watching the car heat up while holding on to a wire.. and there are 5 wires between those two sensors.. so that could realistically take me several mornings.

Thanks.

[biscuitnd]

btw. if you want to know what I'm up to, see sig.

[biscuitnd]

I talked with my mechanic and he confirmed that I was doing it wrong..

Yes, the sensor on the radiator is a dual-switch.

The one I thought was the other sensor was the plug on the thermostat housing. This is actually an electric thermostat controlled by one of the temp-switches.

Apparently the sensor is on the water pump, angled towards the drivers side. Gott the direction I need now.