2008 Expedition- need help feeding power to aux light switch inside cab

[thegeneral]

Newbie here,

I'm trying to run power to a switch for some roof mounted lights on my 08 Exp.

I need the power to be in the cab, as opposed to running from the battery.

Any ideas on where I can tap in and get power underdash?

Or do I have to run through the firewall?

This is my first Expedition, always have been a Yukon guy, but really love the way everything is coming together on this truck. Great ride/handlling.

I've had it a month and so far, here is a list of things i've done-

Ranch hand legend grille guard
Yakima Megawarrior roof rack with extension w/8 Yakima mounts (for extra stability)
Kenwood DNX6990hd stereo
BFGoodrich All Terrains

and am currently working on an integrated roof rack led lighting project.

But need help wiring!

 

[VTfireftr]

The easy answer, but not what I would do, is directly from the fuse box located on the right side kick panel.

I would run the switch from the fuse box to power a relay that draws off the battery - through a fuse - to the lights. This way you won't fry any OEM circuits or burn up your truck should something go wrong.

On a side note - I have been installing afermarket emergency lighting and sirens in my and other members of my fire and rescue departments for over 20 years, and I have never had any issues with my wiring or installs.

Spend the time money and take the time to do it right the first time.