Wiring is easy once you wrap your head around relays. Before you smoke your equipment, do yourself a favour by doing some reading. Then, once you think you get it, try just "dry wiring" a relay and holding it to your battery directly to make sure it all works the way you expect. You'll probably screw it up your first time, so
make sure you use a fuse, and don't hide relays behind panels or whatever before you know your configuration works.
Here are a couple really valuable sites for 12 volt wiring. It all looks complicated initially if you truly have no experience with wiring systems, but if you break it down and read carefully, it's really not bad.
http://www.the12volt.comhttp://www.r1200gs.info/howto/relay.htmlhttp://www.engineeringtoolbox.com/amps-wire-gauge-d_730.htmlThe most important rules I've learned when I was a car audio installer back in the day are these:
1) Never connect anything that draws power without a fuse. Ever. I have a buddy with a nice burn scar on the palm of his hand because he ignored this rule.
2) Wire that's too thick (heavy gauge) is better than too thin (light gauge). Here's a hint: 55 watt lights draw about 6 amps each. See the last link above for information on why this matters.
3) Learn how to use relays. A $2 relay from Princess Auto is unbelievably versatile, and you'll use this knowledge over and over again in your truck.
4) Use a ground trigger for a relay whenever possible (it will make sense once you do some reading). The fewer live positive wires that you have running through your truck, the better, especially when your bouncing down a trail.
Lights are bone simple to wire, and it's a great, easy first leap into the world of +12 electricals.
You can torch your truck and burn yourself if you don't know what you're doing, so be smart and learn before you actually connect anything. Don't be afraid of wiring, though... you can't electrocute yourself with a 12 volt battery, and you'll wind up getting more free beer than you can imagine if you can be "the guy who knows wiring" in your group of friends. Just ask my poor liver.
S