With several items not working, it will be a power feed problem to or from the fuse box, or possibly an earthing issue somewhere. You'll only solve this by tracing it out with a test lamp, & the wiring diagram, which will also provide the wiring colour codes. Use a test lamp with a very sharp point, that can pierce cables.
The KE70 wiring diagrams, are available on line, if you Google KE70 Wiring Diagram / Images.
Altezzaclub has posted them on this forum, in his various posts.
I found if you are having issues trying to follow the wiring digram, then just draw the particular circuit you are interested in, on a fresh piece of paper, starting at the battery +ve terminal, & finishing at the battery -ve terminal. Mark in the colours, & the whole thing becomes much easier.
Alternatively, do as Altezzaclub does, by highlighting the circuit you are interested in in a bright texta colour. Makes it easier to follow.
Cheers Banjo