looked at hand book does not say which one.
l need to find out which is the brake light fuse

Its in the drivers hand book.

interior fuse box F5 10A.

The fuse box cover should tell you what fuse is for what circuit. It will be on the inside of the lid.

The brake lights r NOT fused seperately, which is why it will not tell u in the handbook.
The brake lights will be fused through the ABS circuit.
However, if u r looking for this information l assume none of ur brake lights r working. If one brake light is out it will be the bulb, look back through this section a few weeks to find out how to remove the rear light cluster.
If all ur brake lights r out but u r not getting an ABS fault on the display then it is a faulty brake switch. This is located behind the dash mounted near the top of the brake pedal, it is a cheap & easy to replace item. If the fuse for ur brake lights was blown then it would also knock out the ABS & u would have a fault on the display & a warning light on the dash. In which case a trip to ur local dealership would be in order as this would be beyond ur ability to diagnose.