Frustrating

Lights on the trailer not all working. Checked it bulbs and contact were OK. The plug was badly corroded so got a new one and fitted it with all the seemingly 100s of wires (only 8). But still didn’t work. It looks like the socket on the van is also the part of the problem. Proved that by testing it on the caravan and it also didn’t work. So tomorrow it will be drilling out the shredded bolts and fitting a new socket. Fingers crossed.