Forum Discussion

kathyday1851's avatar
kathyday1851
Explorer
Jan 17, 2021

Im looking for a wiring guide for my Motorhome.

Im trying to wire a generator to dash switch but I need the wiring guide for an Onan 1986 6500 Emerald Plus. I have 4 wires.

I also am trying to figure out what the second fuel line is for. 1 line goes to fuel tank, but whats the second do and where does it go to?

10 Replies

  • The1 line is hooked up to the generator carb but I have another line that I don't know where it goes
  • enblethen wrote:
    Page 33 for remote wiring
    Should have only one line for a gasoline unit.


    Correct. Where does that 2nd line attach too on the Genset? Can you post a Pic of that 2nd line? The Onan GASOLINE Fuel pump is a very small PSI pump and will shut down or idle when excess fuel is not needed. There should be NO 2nd line or return line. Doug
  • When you look at the Link supplied, remember, the Start and Stop is a GROUND (negative) circuit. The B+ (positive) wire is for the ON indicator light in the switch and also goes to any Hour meter.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,373 PostsLatest Activity: Apr 02, 2026