Originally Posted by 86Scotty
Tell us more about the van. SMB build? Cargo or passenger?
This has been covered before, here and on the Ford Truck Enthusiasts van section. Member here (and there) JWA will hopefully chime in with more info. I'm thinking he has some experience with this or knows who does.
Good questions Scotty!
My schematics for '98 show Fuse #5 of the Central Junction Box (aka CJB or inside fuse panel) should affect only the RKE module so removing it theoretically shouldn't cause any loss of functions elsewhere on the van. There are no other circuits protected by that fuse.
If the lower trim of the driver's side B-Pillar can be removed there are several connectors present, some of which aren't connected to another mating connector. Keep in mind this area houses wiring harness connectors that feed things like dome lights and all rear brake, turn and reverse lighting too.
If the connectors for the RKE are present then its possible they are somehow allowing a small current drain---pulling Fuse #5 suggests something is causing this.
Then again I don't think a 0.15 drain would be a huge issue if this is a daily driver. Its higher than ideal but any good starting battery should support that---radios and other keep-alive memory functions probably draw that much normally.
Pull the fuse and start/run the van---if all is well you don't need to do anything more. If you lose any functions post back please.