I changed the bulb with one core instead of two filament brake lights were coming on when I turned lights on . i changed the bulb and it mended the break lights problem but one side of back light where I put wrong bulb does not come on.

Abbas, January 2016

Check the twin filament bulbs on both sides. Are they exactly the same or not? Are the pins on one offset at different angles.

Does swapping the bulbs over between each side make any difference? This may help you to identify what is wrong, and whether you are trying to use a wrong spec bulb.

ChicksFan, January 2016

Have a look at your handbook and check the fuses for the rear lights

cdc, January 2016