I have a 2002 wells cargo 7 x 14 trailer with two dome lights. I heard that some trailers need the break lights on to ground the dome lights to turn them on. Ive tried everything except having the break lights on when i turn on the lights. So my question is could that be the problem or is it the wiring itself, also could it be that the trailer plug and the truck plug electrical connections do not match? It does have electric brakes and there is a wall switch.