Side marker lights and trunk lights

What's going on guys, I need help, both my left and right rear side marker lights are out. I've replaced the bulbs recently and they went out again. The trunk light has been out forever. As far as I can tell. I stuck a volt meter to the side marker lights and it only turned out 0.3V I touched all my other lights in the car such and the interior map lighting and it's at 11.7-12V. I've checked all the fuses as far as I can tell also but I can't find any corresponding fuses to the rear lighting. Are they all in one of the replays or what? I don't understand what could be the problem haven't had an issue like this before was wondering if anything else has had this problem or knows what's causing it. If you guys could lend a hand Id be extremely greatful. Thanks guys !