i just recently fixed my smog pump on by '01 chevy zr2 blazer and i just got done installing it and i found out that there was a 30 amp fuse that i needed to replace because it had blown that fuse is located between the battery and the passenger side fender allong with a little ten amp fuse. but anyway i replaced it no problem and the pump truned on and about a month later the same fuse poped and i was wondering what would be causing it to pop? please write back.

 

Is part of the harness grounding out somewhere? Just a thought. Might be more to it then that