I just installed a brand new Topper Light Board - the previous one was broken. The problem is, at least half the sockets aren't working (I tried multiple bulbs and harnesses appear connected properly).
Although I know it's possible the boards I got are faulty, I'm wondering about other possible causes... Specifically I'm wondering if it has to do with the connections through the harness... Either dirt is impeding or I just simply need a new harness?
Any thoughts appreciated.