1994 & 1995 Saab 900’s were equipped with ACC. As a result, the fan for the cabin temperature, which is supposed to only run for four minutes once the vehicle is shut off, will run continuously when the vehicle is not running. As a result, it appears that repeatedly discharged batteries are caused by poorly performing alternators. Saab has determined that a short in the ACC ECM causes this condition.
Pin #3 of the ECM needs to be grounded with the use of some black .5 sq. mm wire, and cable terminal (Saab part # 41 15 499) and a wire splice connector (Saab part # 95 60 012).