From the sub-forum location and subject line, I'm guessing this is asking how to start the generator on the Road Warrior.
The 2013 Heartland Trailer Manual says:
Generator
To operate:
• Make sure the generator exhaust is unobstructed.
• For gasoline models only, press down on the generator
switch (located on the main switch panel) and hold for
2 seconds to prime the generator. This does not need
to be done unless the generator has not run for awhile
or has previously run out of fuel.
• Press up on the switch to start generator.
• There will be a slight delay in power due to the
electronics built into the generator and the transfer
switch.
• If there is still no power being generated after 45
seconds, check that the breakers inside the front
cover of the generator are turned on. To open the
front cover, pull out on the top of the front cover. There
are two 30 amp breakers as well as another start/stop
switch that operates in the same fashion as the interior
switch.