chassis fault light

I've had my 2017 Scout one year in August and have put 7k on it for a total of 8655 miles since acquiring it. Dealer installed a new tire when i purchased bike at 1665 miles due to a flaw in sidewall which had reflective material covered up w paint I guess..washed and it was...

Got a chassis fault light, pulled up the error code (520320, 4) which translates to brake light shorted to ground. Checked and sure enough brake light is not coming on. Question is, are there any easy things I can check to fix it or should I just take it to the dealership. There's only...