renault scenic alize 1999 - 1.6. every time i put my foot on the brake, the right side indicator comes on.????

Check the connections on the lamp units making sure that the correct bulbs are fitted and no corrosion is in the holders. Corrosion can cause high resistance and this causes a similar fault like you have mentioned.
Hope this helps.

hi this ones easy you have a bad earth on the light cluster clean all the conections and make sure the earth is good whats happening is the earth isnt good so the brake light is earthing through the indicator instead making it light aswell just like christmas tree lights where one feeds through the other well your light share the same earth and if its not good then they earth through eachother hope this helps andrew