New kid here on the block, hi y'all! I have a Ford Motorhome 1992 National Tropical 27 with a 460 cubic Ford Engine with an E350 Ford Chassis. I have been wracking my brains out for 3 weeks on this problem. It has to do with the fuel pump. I changed spark plugs and fuel filter and all of a sudden it would not start. There is no pressure to fuel rail, but the inline electric fuel pump does initialize for 1 second and then that is it. I could not find the fuel pump relay, although I checked from top to bottom. There are 2 relays, but they are 4-prong. The automotive place said they found a 5-prong, cannot find it. The truck was running prior to this. I checked the fuse box with ignition key turned on, I got juice to all the fuses except the 10-amp which goes to the EEC, why? The ignition switch does not trip. If I spray starting fluid into the engine, it will start, so I know it is not the spark plugs. I replaced ignition switch to no avail. Does anybody know if this RV would have a fuel relay switch, which I cannot find? I do have the number off the old switch, the auto store could not cross reference this. I need to know what other steps I could take to get this RV running or how do I hot wire the fuel pump? Also, I checked out both relays and had a friend turn on the key on while I held the relay in my hand, both of them clicked on and for 1 second, one clicked off, so I hope that was the relay that energizes the pump for 1 second. So I know both of those relays are working. For the life of me, I cannot figure why this RV would stop running from just changing the fuel filter and putting spark plugs in. Any suggestions would be appreciated, thanks!

P.S. Does anyone have a wiring diagram of this RV or a wire diagram of a fuel pump? Thank you!

 

Here's where you can find the diagrams for it. http://www.autozone.com/autozone/rep...00c15280072a31