While searching for incite of how my scamp was wired, I was unable to find the information I needed. So, this information may be helpful to many. I am a retired class A journeyman electrician. I was thankful of my back ground which helped me solve my problem. Perhaps this will help others. First, the negative from the battery runs around the entire trailer ending at refrigerator. The positive wire is split in the front closet; one wire is fused (20A) the other is not. The fuse is for the first three lights...bath and front table. The other three lights are fused (20A) in the power panel. Power for all the other appliances are fused in the power panel. To my knowledge there is no fuse under the back bunk. Also, the positive, 12vdc is constant at the 12 volt lights. The negative is switched.