hey guys, I'm in need of your help desperately.

My oem temperature gauge isn't working correctly due to some previous owner mistakes messing around with the gauge cluster, but I need to make a trip home for xmas. I don't dare drive on the freeway for a long trip without a temp gauge..

So I was thinking I could just hook up my voltmeter to the temp sender wire and monitor the volts. I tried this and I'm getting voltage readings anywhere from 10 volts down to 6.5 as it warms up, and then I jump my fan switch and turn on my fan and it'll climb back up to 10 volts again.

I was wondering if anybody knows what temperature these volts are equivalent to?

Also how can I fix my fan switch. It doesn't come on by itself, but if I jump the postive wire to 12v it'll turn on.. what could be the causes of this?

thanks for your help guys.. I need answers asap cause I gotta head out for home tomorrow. 6 hour drive owns meh.

maybe a couple really really cool and helpful people (thats you ) could even go test on their own vehicles to see what it reads at normal operating temp.. I just need a general idea. and don't want to wire up an aftermarket gauge just for the christmas break and waste my money