Wiring access?
 

So I love my '12 F350 KingRanch but how do you all run Emergency roof lights wiring into the cab from the back, or thru the top? thanks bob

Into the cab from the back, there is a round black plug/grommet in each rear lower corner of the cab. There is also an oval plug in each front corner of the body.

To get to the roof with my cell booster antenna wire, I went through the sliding back window. For a permanent installation on the roof, access could be gained through one of the clearance lights to avoid drilling a hole.

thanks knothole; I thought that was the reason for those black plugs.