After replacing the wires going to the thermoswitch connected to the thermostat I could never figure out if my switch was working properly. I did jump the switch and was able to run the fan in low and high. But my car would never go past 5/8 on the temp guage while sitting. When should the aux fan go into low? Is it half way on the temp guage or 3/4? In the Bentley book it tells you it should start at specific temp but I'm not sure what that would be on the needle. And what is the normal position of the needle when moving.