Hey all, Yesterday my engine light came on and kicked these two codes: PO412- Secondary Air Injection (AIR) Solenoid Relay Control Circuit and PO418- Secondary Air Injection (AIR) Pump Relay Control Circuit. I have the GM service manuals and it pretty much said that it could be a faulty relay.
I replaced both relays and had the codes cleared...service light still comes on.
Does the Air pump or Air solenoid have some sort of fuse?
What else could it be?

Thanks-

 

Found a blown 25A fuse for Air Pump in Fuse block 1.

Now the question is: Why did it blow?
What are the probable reasons?