I purchased a 1989 Ford Motorhome on a E350 chassis. It has a 460 engine and will not start. Found and fixed the following, fusible link at starter motor relay was blown, broken wire in back of motorhome, have traced all wires from batteries to fuel pump, and replaced both batteries. Unit will crank but will not start. Checked the following, EEC relay, has strong snap, fuel pump relay, no snap when key is turned on, but as a stand alone test, the relay pulls in strongly.

Have checked that fuel pumps run. Now am suspicious that blown fusible link with connection to pin 1 of EEC may have blown unit. The reason is that the voltage at the fuel pump relay is only about 4.0 volts when tested in place. Can anyone confirm suspicions or give me some other items to check?

All help at this point is welcome. Thank you.