Mk 2 scenic light prob after fitting tow bar

Hi,

Today I fitted my towbar. And whilst I was wiring it the back bulb blew, so I changed it but it still dosent work. I done a quick check of all my lights to find out I have no back driverside light, but brake light works & has no driverside sidelight?

Bought new bulbs but still nothing. I checked fuses under bonnet & glove box but all looked fine.

Any help would be most grateful. Thanks.