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    • Alright I got a new Isolator (switch interuptor - what it says on the box). Basically looks the same as the one that was there but has the two prongs on the front. According to the diagram up above the second prong needs to be grounded. I did all this. I grounded it to chassis. I hooked up the other wires turned the key and what do you know?! I have 12 volts coming out the other side of the Isolator and to the coach battery. So I loaded up the dog and we went for a Sunday drive. When I came home an turned off the vehicle the gauge in the coach said full charge of 12 volts. So I think this all worked. My only guess for why that white wire was disconnected from the isolator is that it wasn't actually connected to the wiper motor but it was the actual connection to the Ignition. Maybe it was disconnected for winterizing?? So no chance of the house battery getting any charge form the car battery? Who knows.

      My only fear now is that the ground wire is attached to the wrong place or the wire isn't a heavy enough gage. I'll take a pic and post. 

      Thank you a ton everyone for your input and helping me get this problem solved.

      Edited by Thirsty Spirit
    • OK dead battery or not the terminal on the other side should have been pretty close to the other side. It kind of points to the isolator being toes up that could be why the control wire was disconnected. As been stated before do not use a starter solenoid it will cook in a matter of minutes and it's possible it killed the wiper fuse and that's why it was disconnected.. 

    • 2 hours ago, Gulfstream Greg said:

      Can you hear the solenoid click when you give it ignition power? If it does not click and you have 12v on the small terminal it is bad . If it does click and you only have 12 volts on one side of the large terminals it is bad. If it has 12 volts on both sides follow the wire testing as you go. I may have missed something but why did the previous owner cut the wire going to the windshield wiper motor. Were both add on white wires not connected to anything? Find any other wires that are not connected to anything? 

      I’m with you Greg. A tap makes sense. Cutting the wire makes no sense.

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