Originally Posted by ScOoTeR
Click on the PDF - it has the wiring schematic on it. Only control is a 3-position rocker switch for low/off/high - I wired it to ignition-on power.
thats kinda my point...I didnt see anything there that would suggest it was anything other then resistance, so I have to question thier life span. I'm sure they would still last long enough to make up for the low cost.