Thanks for the replies, I've downloaded and read through them although it looks like I may have misread the operation portion. So I should have battery or system voltage at the connector for the temp gauge sensor in the driver side head. The diagnostic procedures listed I have followed, I ground the wire and the gauge indicates hot and I have replaced my sensor. The replacement reads around 4-5k ohms cold (around 55 ambient) and dropped to 150-500ohms at operating temp (don't remember the exact reading) which fell in line with the charts I've found online when looking into this. Correct me if I'm wrong but it sounds like my actual Gauge is bad then, Correct?