[mpumas]

If the high mount brake lite works then you have power to the failure sensor module which supplies all the brake lights. I would look to a ground problem on the tail light fixtures. As for tail light fuse problem. that could be a bigger problem because that fuse supplies power not only to the tail lights but also to dash board and switch lights rough the dimmer module, the glove box. vanity mirror, front marker lights, license plate and the tail lights. Could have a short in or near any of the above mentioned lights or the wiring going to it. Start by solving the easy problem first then go to the difficult one.