Mike L
Senior Member
It hooks to your battery or alternator and will run on 12-36 volt. If you touch the probe to a connector or pin it will read voltage or ground. Then it had a switch and if you push it forward it will send power out the probe and backwards will give it ground. It also has a short pigtail which will check continuity or give you and external ground to power say a lightbulb or if you need a power and ground source. It will do more but that’s the basics. Very handy.