I recently bought Power Probe III for 99 bucks. It was expensive for hobby but since I started to wire my truck and found and thought I needed a good multimeter instead I bought this one it is indespensible. No searching for grounds, 20FT wire allows you to go around the truck and work and you can use cigrate lighter adapter to power the tool and test your accessories and switches.

I like it a lot and when you guys get chance take a look at it.