Rear break ligths not working, fuse is fine - 2008 Isuzu i-Series

First check fuses. The parking lights and dash lights come on with the light switch, but have different fuses. if you have front lights( the switch is good), but no rear, check the grounds in the rear. They are usually mounted to the frame on the drivers side rear. As for the dash they have their own grounds. Places I know are at the steering column and behind the drivers side kick panel. You could also have problems at the plugs them selves, Corrosion. If you have no parking, brake, or reverse lights, it is a ground problem.

Did you check to see if there is a fuse on the brake lights circuit?

If you changed the lamps and the brake switch it is obvious that they are not being energized.

you need to check at the switch if you have power and then if you have ,,, continunity to the rear brake lights ,,,,,i know its basic but your problem is either no power to switch due to a break or bad connection or after the switch due to the same,,,,

More than likely its bulbs .

Did you pull the fuses and look at them? If you just stuck a probe in there you will get power even if the fuse is bad.

There might be a short between the alternater and ground.
Check wiring
Disconnect battery and alternater wiring from the back of the alternater and with a multimeter check for continuity between the BAT stud on the back and the alternater housing.There shouldn't be any.

Sounds like a fuse.

Should be able to check the fuses visually. Look for one that has the small metallic connecter (center of fuse) burned or broken. You can buy a small package of replacements from a part store. Ensuer the package has the correct fuse (there will be a color to the fuse, as well as an amperage printed on the top (i.e., 4A). Here is an image of what they typically look like: http://www.electronics123.net/amazon/pictures/afu.jpg.

try to replace the bulb it can be also short,

Hi miguel_mitie, the reverse light switch is on the right hand side of the gear box and has a square 2 pin connector, it may also be worth checking the wriring in the rear harness by the boot lid hinges as the wires have been known to break

i took my car to the shop and my 3rd break ligths was wired to my ligths