Need onan marquis 5000 model 5bgmfa26105f wiring

Sorry we do not have that manual here, you will need to order it from the manufacturer.

Go to Onan's suport site at

Our motorhome Onan 5000 Marquis generator will turn over and try to start but fails everytime we test. We have primed, gas and oil are fine and we have new spark plugs. We also changed the gas filter on the generator. Any suggestion? Thanks, Loretta

There are many possible reasons from stator output voltage to sensing, to fuel to control boards. A good place to start (as the unit does run) would be with the fuel system, if it has sat a long time it won't help. Also the fuel filter. try conencting to an external fuel tank versus the vehicles, as sometimes pick up tubes in main tanks can be an issue. Also check the correct oil level and viscosity / and oil pressure switch. Failing that I recommend a service center, as there really are so many causes, I cannot list all on here.

Neither are available at cumminsonan.com but you might contact them for more info than is contained in these two manuals:


http://www.cumminsonan.com/www/pdf/rv/f-1123.pdf
http://www.cumminsonan.com/searchresults?search_text=marquis

red and black are power or hot wires white is netrual and green ground need a little more input ,good luck

12 V going to the pump, but is it turning (do you hear it running). If not change it.

ONANS ARE PRETTY QUIRKY AS IT IS NOT CONSUMER FRIENDLY. THE GENSET IS DESIGNED FOR ROUTINE AND SIMPLE MAINTENANCE PERFORMED BY THE OWNER, AFTER THAT, U WILL NEED TO TAKE IT TO THE NEAREST DEALER OR CUMMINS DIESEL REPAIR SHOP.

Test the solinoid with an ohms meter and if the circuit is open replace the solinoid.

You MAY have blown the rotating diodes on the rotor.

This would require servicing.