Hello, welcome, You'll get a lot of help here.
The answer is yes, yes, and possibly something else too.
You say you added the fan. I assume everything was working like it should before the addition. Where did you get the power to the fan?
Did you check all fuses and breakers?
Even though they may look on, flip each breaker off then back on to reset them. They sometimes don't appear tripped.
Mark, Vicki, & Scout THE dog
2015 Hemisphere 282RK
2011 2500HD Silverado
1992 Goldwing Aspencade