So my wife and I had a brake failure on the highway yesterday... which was fun. I have tested our vacuum pump with a gauge and we aren't getting any pressure from it. A couple of questions. 1. Does the vacuum pump run on an independent fuse that I can check or replace? 2. How much should I expect for a pro to replace the pump? 3. Is this the kind of part can replace myself? (I have mechanical experience with older cars).