some kind of housing to hide a wad of wires

I've got a big clump of bare wires hanging off the back of my truck and I just want something maybe rain- and splash-resistant to hide them in.
I'm thinking like one of those plastic boxes that house sprinkler system timers.
Ideas?
Anybody got something that might work?
Thanks

How about this, kinda expensive at lowes though:flipoff2:

Yes! That's exactly what I was thinking!
Now I won't even have to build a flatbed!

































:flipoff2: