2002 Ford Excursion electrical issues

Numerous electrical issues with my 115k miles Excursion 5.4. No dome lights, cig lighters non working, fuses good. Running board courtesy exterior lights remain on for 5_-10 minutes after exiting vehicle with doors fully shut.

Bummer. Do you have a question about this?

The most common cause for electrical problems of your vintage of Ford is the GEM (Generic Electronic Module)

https://moduleexperts.com/gem-modules/

Tester