n/s side lights not working....?

Dear colleagues
Firstly thanks to Adam16vt without whom my air bag light would still be on.
Final fix needed in order to get an MOT;
n/s sidelights front and rear aren't working. Have replaced rear bulb and brake light works but side light doesn't. Have checked the fuses (same one does n/s side lights, glove box light and rear plate) but they appear to be OK.
Any ideas?

Hello members
Just prompting again to see if anyone has any ideas for a fix...?

Hello, the same thing happened to me with the front ones, I discovered that it was a defect of the cable about 25 cm that starts from the lamps, I remember that there were also other plugs in that cable maybe the fog lights.

Great thanks for that I'll interogate further at the weekend.
Regards