I puchased a 1979 450SCL that has 123,000 miles on it. The car had been sitting in a garage for 5 years and not started. I jumped the car off and it ran great for awhile (no smoke or anything) until it stalled one day. The fuel pump has quit and there is no voltage going to the fuel pump. The fuel pump had been making a noise that was getting worse before it quit. I have a repair manual for the car, but have not been able to locate a blown fuse or bad relay. I have checked all the fuses that are located under the dash in the kick panel on the passenger side of the car. There are relays under the dash but the manual I have doesn't say which relay is for the fuel pump. Do you have any suggestions on this problem? Thanks, I am getting desperate.

P.S. Or if anyone knows which relay is for the fuel pump, that would help also.