Volvo: red light on dash, volvo 940gl, bulb failure

Question
Hi I have a VOLVO 940GL 1991, AND RECENTLY A RED LIGHT HAS
COME ON , ON THE DASH, LOOKS LIKE AN EXCLAMATION MARK IN A
CIRCLE.
DO YOU KNOW WHAT IS IT FOR? ( I DON'T HAVE AN OWNER MANUAL)
MANY THANKS

Answer
Margaret,
It sounds like a bulb out warning. The warning light comes on in the event of broken lead, poor contact or a broken or faulty bulb.

The bulb failure light may be set differently for different markets.

The following bulbs may be included:
low beam.
rear parking lights.
brake lights, the warning light comes on when the brake pedal is depressed.

The bulb failure sensor grounds a lead on the instrument panel and the light comes on when the reference voltage in the sensors monitoring unit alters.