I have a 2001 Vectra and I can't seem to find the coolant sensor for the temp gauge? in the haynes it says its located in the thermostat housing and has a single blue wiring going to it, all I can find is the sensor for the engine management which has two wires a blue/red and a brown... Im stuck anyone able to help?
I need to change it as i think its the cause of the temp gauge not working all the time...