Fluke. Ive got a 73 III for my garage and home troubleshooting, it sips its battery - I've replaced it twice in 10 years. If youre handy with a soldering iron, the test lead possibilities are enormous. I carry a small Extech in the bike's toolkit, its a fraction the size of the fluke and is perfectly capable of doing wire checks and voltage tests.
If you're all about the destination, take a fucking flight. - Frank Turner
Got brap, and twice as much fuel as you. - Akarob