I’ve bought a 2015 transit connect limited with stereo satnav .. the problem started with the stereo turning on when the van is turned off and locked it ended up flattening the battery.. so I disconnected the battery for a hour then reconnected and now the problem is ....the on off button doesn’t work it only does the volume....when I take keys out lock the door the stereo turns off .. when reopen get back in the van the stereo comes on ... I had it diagnosed today and it’s come back with these codes u201387 switch module missing message....u201396 switch module malfunction.. as anybody got any idea what the problem is ... I have had stereo out and checked all connections ?