Actually the breaker does not have a yellow button. The breaker has a red button and when the breaker is tripped it may display a yellow tab or flag. In the attached photo the breaker is located just to the left of the batteries. On some coaches the breaker is in the house battery box and then some may have the breaker, or a second breaker in the engine compartment.
If you download the photo and increase the size it will give you a better view of what you are looking for.
Thor Forums
