Ford transit connect 2006 multiple electric issues suddenly

[bladesharp]

Got an issue where my heaters, electric windows, wipers and brake lights have all stopped working. Engine management light is on and has fault p0504 brake switch and the other day had p1622 immobiliser id does not match but no longer present. Van runs other then this. Have checked fuses. Any suggestions as to what the underlying issue could be?

Edited by bladesharp on Sunday 12th September 11:57

[elanfan]

Check the battery state of charge if it’s been low you can get all sorts of weird issues. Then check and clean up the main earth.