No 12VDC Power

Alright folks... boy do I feel dumb! My electrical master brother did a facetime with me this evening to find the issue. I had the positive and negative cables correctly hooked to the battery. What i didn't do correctly is that I installed two additional wires (white and black) to the positive battery terminal. It was supposed to be the white wire to the negative terminal and the black one to the positive terminal. You got to love RV manufacturers and their disregard to normal cable colors indicating +/-. Nonetheless this was 100% my fault! Still don't understand why the problem took several weeks to surface. The only thing I can come up with is that I did not turn the battery disconnect switch until recently. Label your wires when you remove them from the battery for a season. Thanks everyone for you advice and input!