Demons have invaded my 1990 740 GLE wagon:

1) When the headlight switch is on, the 3rd brakelight goes on & stays on; the bulb failure light goes on but shuts off when the brake pedal is depressed. When the switch is off the 3rd brake light is on only when the brake pedal is depressed (bulb failure light on but off while pedal is depressed).

2) With the headlight switch off, the front parking lights & instrument panel lights go on when the brake pedal is depressed (bulb failure light on while pedal is depressed).

Thank you in advance for any advice or suggestions you may have.