10V may not be adequate, I suspect due to poor connections. FWIW, over 80% of 12V issues are due to poor or missing ground.
For 12V+ I would connect to a tail lamp, this way you may monitor your tow-bar and vehicle while driving by turning on your parking lights/headlamps. You need to locate a clean solid ground.
My MH had a non-working Sony BU system, I removed it and powered the camera by re-purposing the old coax from the dash area, center wire was 12V+, negative was braid. It's still working 6 yrs later.
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2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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