how many amps are you pulling?? there are several ways to do this. If the devices are electronic, you need "clean" power with direct connections to the battery and a good ground... (the ground is most important) the best way is to always install a relay and an independent wire run from the battery. Then you can use the latch on the relay on any of the connections in the fuse box that have switched power... most all relays come with wiring instructions and you have the piece of mind that you are not stealing some other devices power... let me know how many amps you need and i can provide more ideas... 
__________________ LLY+Allison 05 Black Chevy Silverado 2500HD LTZ85 Crew Cab Short Box
Eaton Lockers, 5" Turbo-Back Stainless Pro Series, lost/stolen cat  (reward if found), SuperChips FLASHpaq "stacked" on an EDGE Juice w/ Attitude, PPE Variable Boost Controller, K&N Intake System, 20" American Racing Chrome Wolverine's, ReadyLift Leveling Kit, Peripheral iPod integration, I hate mods lists!!...blah blah blah... H&H Diesel Performance - Colorado's Diesel Performance Leader | 
Linear Mode
