Corsa B temp gauge wiring

[tone]

Hello
can anybody help i have a v6 engined corsa b and need a temp gauge can anybody tell me where this wire is?? i need to make the gauge work ??? i have tried to earth it out but the gauge in the car didn't move any help will be greatly received or i havn't found the right wire, solid light blue coloured wire any pics of the loom showing it or a way to test and find it would be great

[CorsaBLuke]

if i understand correctly it is on the rad buddy

[tone]

thats what switches the fan on not the one from the temp gauge i'm not sure