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FLASHING DASH LIGHTS, NO GAUGES, CAN'T PULL CODES 850

MY 1993 850 (137,000) STARTED TO FLASH THE LOW FUEL AND SERVICE DASH LIGHTS AND THE TACH AND SPEEDOMETER, FUEL AND TEMP GAUGE DO NOT REGISTER. THE CAR SEEMS TO SURGE SPORADICALLY AS WELL. I TRIED TO PULL A CODE OFF OF THE NUMBER 7 PLUG ON THE COMPUTER BUT IT JUST FLASHES RAPIDLY AS SOON AS THE PROBE IS INSERTED. THERE ARE NO OTHER CODES (EXCEPT FOR A WHEEL SENSOR)IN ANY OTHER PLUG. I DON'T WANT TO DRIVE 90 MILES TO THE DEALER IF IT IS GOING TO HURT THE CAR. ANY IDEAS?
THANKS IN ADVANCE.







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