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Blown 50 amp fuse S70 1998

posted by  patrick0525 on  Tue Feb 2 13:48 CST 2010
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last visit: Sat Feb 6 09:49 CST 2010
[RELATED]

It has been extremely cold in the Northeast US.

How about this scenario:
Prior, to my starting problem. I would hear the air pump randomly turn-on for no apparent reason. This is after the engine has reached full operating temperature. (I would hear it turn on and off at a stop light. I consider this normal because PA state emission inspection performed on Jan02,2010 reported 'zero' OBD-II error codes.)

What if water collected in the air pump froze, the pump momentarily seized and became a high-current draw. Wouldn't this be considered a dead-short condition and be sufficient enough to blow the 50amp fuse? This could have happened during my drive and prior to me parking the car.

Today, the service checked the air pump and he said it working and not seized.

Any comments? I know I need to replace that SAS valve allowed the moisture to enter the air pump. Probably drilling holes on the bottom of the input/output sides of the airpump would facilitate moisture drainage.





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