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Are you trying to charge the start battery or the house batteries? Was the 14.5 VDC on the alternator side of the solenoid? Do you have a converter or an inverter/charger?
Were you plugged into shore power or did you have the genset running when you took those readings?
Did you check this while plugged in OR with the genset running?
That happens sometimes...........they are always working to get the "bugs" out of the sytem. I do think a some wiring diagrams would be helpful. Let me see if I can find some for you. R.J.
Go to the the link below for a good source for manuals. I have had a number of customers find what they needed there. R.J.