gstep,
SON gave you the best answer you will get anywhere. If you were to prowl the web (like with Google) and find some service data for your SPECIFIC Onan and then find a friend that is capable with electrics, he may be able to tell you just how much damage you actually did.
You should also look things over. Such a move often takes out converters, inverters and radios, too.
Matt
Matt & Mary Colie
A sailor, his bride and their black dogs (one dear dog is waiting for us at the bridge) going to see some dry places that have Geocaches in a coach made the year we married.