[peanutbutter]

My tools:
Fluke Multimeter - great for pinning out wires or getting voltages. At work I use it for more complicated issues, but it is good for the truck as well.

Klien 10in1 - has everything you need from #2 - 3 flat and phillips heads, to torx bits. Also has a nut driver as well.

Weller 40w soldering iron - I will never connect wires without it. Off topic: I just ordered a ColdHeat iron off of the TV. It will probably suck, but I just hope I can use it on boards or low temp surfaces. Also, it takes batteries.

Stanley Robogrips - I think Craftsman has the real Robogrips but these are the same. Very useful.

Zipties - They can make anything pretty.

19.2V Craftsman Drill and Dewalt bit set - self explanatory

Detailing stick - Has a rubber tip on one end and a small brush on the other. Great for the interior of the truck.