1989 730i SE

Hi, the blower motor only works on full speed and at the same time the interior light & map reading lights stopped working. I have checked all of the fuses and they seem fine. Any ideas???

Ive seen a problem once, when you open the passanger visor mirror cover on a E39 your AC controls turn off. It ended up being an ignition cylinder (the spot where you put the key) since many of the lightings and other things have a ground there.

The blower on full speed is a known fault the sword needs new capacitors.

Have you checked the fuses under the rear seat ?