On a 98 ML 320 I am having problems with a code P0410. My question is the 40amp fuse that says it is for the Secondary Air Pump doesn't have any juice on it. I flip flopped a couple of the relays for the Secondary Air Injection and that did nothing. My question is that I have no fire getting to the secondary air injection pump. Should I not have fire at the 40amp fuse and at the pump itself? If so is there anything typical that goes bad that would make this happen. Thanks