In my 1999 Winnie (it may be an F-350) the cigarette lighter and the
Diagnostic plug are alone on a 20 amp fuse. You might want to just
pick up that circuit if you are under 20 amps.
John Ferrell W8CCW


My E450 ( not F ) has an additional cig lighter type socket a few
inches above the cig lighter socket on the dash. I would much prefer to
wire directly to the battery, but will consider your suggestion if I can
not find a decent way to route wire to the engine compartment. Thanks.

Ed