Sometimes a car just doesn’t have enough power sockets to go round, and that’s why multi-socket adaptors are handy things to have. These adaptors plug into your car’s 12-volt ‘lighter ...

I found a marine-grade 12-volt outlet on Amazon for about $9, which seemed steep but included some wires of its own, fusing and female crimp connectors. I set the extras aside and used connectors ...

Try plugging it into a different power outlet to see make sure it’s working, or plug a different 12-volt device into the suspect socket. (If the electrical accessory itself is at fault ...