my problem is that when I put the ignition key the wait to start and the primary pump does not work then the engine starts but does not run it is an electrical problem I checked all the fuses and the relays and all correct I am in contact with a Cummins mechanic I got the wiring diagram of the engine but I need the wiring diagram Holiday Rambler Scepter 2008 to be able to find the problem Thanks again for your precious help