Volvo: similar hazard light light show, hazard light, mode switch

Question
What was the prognosis on your warning lights going haywire.  I also have the flashing W, and the engine dropping into "weather" mode.

How was your's resolved?

thanks,

Answer
Glenn,
Most times warning light that will not go off are due to the alternator not charging. Have the charging system tested.
The mode switch that is flashing is due to a possible bad mode switch or maybe even fault codes in the control unit, Have the codes read and see what they say.