Thank you for asking your question on Just Answer.
Have you tried replacing the emergency flasher?
Enen though it a motor home it still uses 2 flashers. Enclosed is the scamatic.
The green/red is the power source at the flasher If you have voltage there the you may have a bad switch. Because its a motor home I don't have a test so I will opt out and realist the question so maybe some else can help.