Originally Posted by sailor15015

You can also screw the connecting wire directly into the fuse box. Under the fuses if you'll look there's screw holes and if you can find a screw to fit, its just a simple matter of using a volt meter to see which ones are only on when the key is on. Some will be on all the time, some only when the key is on. This is how I have my Vegtherm heater rigged up so its on all the time. The size wire that the heater needs is too big to fit under the fuses so I have a small wire running from the fuse box to the "power signal" connection on the relay. It works great, heats my oil before the IP right from the get go and I don't have to worry if I forget to switch back to dino when I shut it off because if the key's off, so's the heater.