THere is no fuse ON the air pump, it's on the RCM and it is not the problem. (Check it, but if it is blown, you need a new airpump.)
GENERALLY, this is caused by fractured solder joints on the RCM board, but it can also be an open air pump relay coil on the RCM. As a last resort, the air pump motor may be bad, in which case you need a new air pump.
@tighed1 offers a really good RCM refurbish service, you can email him at
tighed1@hotmail.com to get the particulars. Until you get hold of him, just put your spare RCM in.
Don't have a spare RCM in the trunk? Why not? Just wait till the engine control relay dies - you will be calling for a tow home then. I ordered a new RCM and sent my bad one to DJ. I now have all I need in the trunk: Spare idler pulley, spare belt, spare crank sensor and spare RCM. All those items fail, generally before 100,000 miles. I won't drive the car without them, not anymore, that is.