Porsche 928 S 1986 Driver Manual page 31

Hazard light switch
When the hazard light switch is operated, all 4
flashing lights flash simultaneously.
The hazard light switch is operative in any of
the ignition switch positions.
28
Rear screen heating
The heating for the rear screen and outside
mirrors is operated by the combined twist-
push-pull switch in the instrument panel. The
switch is illuminated when the heating is on.
Switch in pulled-out position
0 - Rear screen heating off.
1 - Rear screen heating on. The heating is so
regulated that the rear screen will not mist
up.
Switch in the pushed-in position
0 — Full heating for de-icing. After approx. 15
minutes the heating turns off automati-
cally.
1 - Full heating for de-icing. After approx. 15
minutes a relay switches the heating down
to demisting power.