Apologies as this really IS a dumb question.

Just had my towbar and electrics fitted. Never had a towbar on anything before.

Why are there two sockets? A white one and a black one. I understand this is where you stick the trailer plug in .... but why do you need two?



 I've been mad for flipping years, absolutely years, over the edge for yonks.

the other one's for pulling a caravan with fridge inside so it powers that