I am redoing a 1965 Caravel
. The Univolt did not work so I installed a Progressive Dynamics unit. The battery is wired to the PD unit. However, I am unable to ground the battery to the Caravel
frame because when I try the fuse for the lights blow....making me think I have a problem. Each system works fine separately...I mean the 120V works when hooked up to shore power and the 12V
lights and fan and the battery gets charged but I should be grounding the 12V
battery to the frame of the Airstream but "can't" because of the light fuse blowing. Help me understand this one. Thanks.