I used the tan wire behind the light switch. It was very easy to get to... Rip off the facia and 3 screws for the switch. I picked up ground there as well, black with orange stripe. Thanks for the info every one. I posted the question and than went and mounted the gauge. By the time I was done mounting it my answer was here. I mounmted a Di pricol pyrometer in a autometer steering column mount. The gauge has two bulbs in it so it is well lit. I drilled a hole in the stock steering column top to route the wires thru. It was a tight fit in the gauge mount but everything looks very good. Now if only someone would make a gauge mount for the hole down low and in the center of the dash (where the cup holders are in an automatic).