Hi Coffee2015,
Welcome to RV.net! Welcome to RVing its a great life even tho' bugs tend to take our joy away for a moment or two.
If you look below the line of this post you will see my "signature" which describes my coach and tow'd. This helps those of us who are trying to answer your question know how to answer your question. For example I am supposing your engine is diesel since gas engines don't have a "wait" light. It could be a Cummins, Caterpillar or Mercedes (not likely). It does make a difference since they are wired differently! the year also matters as there are specifi issues related to some years that are well known.
To add a signature from the My Forums page look to the line above the list for "My Preferences" and scroll down to "Your Signature" (first item on the page) and put the information there. It will then appear with every post you make.