Best way to get power to back of truck

What's the best way to get power for bed lights? Right now I have them hooked up to the accessory power in the trailer plug. The problem with this is that it is switched with the key. I would like to have constant power so I can hit the switch in the bed to turn the lights on without turning the key on. Is there any "always on" power at the back of the truck to tap into?

 

No, there is no constant 12v in the bed of the truck. The best way is to run a new 12v line from the fuse box under the hood via a fuse (20A would be good) along the frame rail to an accessory terminal block mounted either in the storage boxes or the pockets above the wheel wells. Search for other threads here on the subject. While you're at it, add a 12v power point at a location of your convenience (like in the small storage box next to the 115v outlet). Good luck!

 

I'd do it this way

 

I got a couple of cheap and great bed lights at auto zone. They are about 10'' long, very thin LED flexible strips with a peel and stick back. I popped out the little boxes on each side of the bed and droped the wires through there so no cutting/drilling required, and stuck them to the underside of the bed rails on either side.

As for power, i rigged them with my interior lights, so if a door is open, the lights are on. You can snag a ground-side-switched wire from the dome light, down the B pillar, out one of the rubber plugs under your drivers seat, and then you can switch your lights that way. If i need light, i just pop a door open.

I ran hot 12v back from a fuse panel under the hood, and down the frame rail, and hooked it in.