Tail light problem

[Johnboy1892]

Can anyone help my rhs tail light rhs front side light and number plate lights arnt working. Ive checked all the fuses as wasnt sure what one for these and all seem fine. I changed the bulb and nothing. I changed the light and nothing. Brake light works but not the tail light. Please help

[Johnboy1892]

Forgot to say also the heater conteol lights. This is how i first noticed it. I switched the heater from cold to hot and the light just went out. I have since noticed all the other problems.