Passenger side side and tail lights not working

I changed out my numberplate light yesterday and having done that I seem to have lost my sidelights and tail light on the Pasengerside of my defener 110 200tdi . I have LED lights throughout and these were working fine. I reckon I have broken a connection somewhere.

The rear stop/tail light works on braking. So the circuit is there. I take it that the Sidelights circuit is two independent loops on either side of the vehicle. Would a bad earth in the Taillight break the sidelight circuit or am I barking up the wrong tree?

Anybody? I cant seem to get these working and im sure its some stupis arsed mistake i have done

Are they independently fused left & right? The stop is a completely different circuit, with likely a common ground for all lighting at the rear.

Separate fuse for left and right tail so check that.

And check your earths!
If you have LED's all round as a good earth is more important than on filament lamps!!

Had similar fault on my Freelander 2, the rear passenger light not working after changing a blown bulb. The brake light on the same connector still worked?
Read somewhere it doesn't have a fuse, but is managed by the ECU. The ECU checks to see if the bulb has blown, and eventually gives up trying it. Disconnected the battery (didn't need a radio code as it's built into dash on FR 2?), left it disconnected for 15mins, connected back up and light now works fine. Saved a visit to the dealers who needed it to be booked in - cost etc

Is the replacement numberplate light an LED type, if you disconnect do the tail lights start working again?