How can you open the trunk if the battery is dead in a fiero?

Answer 1

Unfortunately, you are in a bad situation. I am assuming that your Fiero is equipped with the decklid release button, where you can push it and the decklid opens and you don't have a key.

First, call a locksmith over and have them make a copy of the key for your doors. Expensive, but the safest. The decklid lock and your door locks SHOULD use the same key, unless someone has changed them out over the years.

The second option is that you will actually have to break into the "trunk" (decklid). This can be done by removing (destroying) the outer portion of the lock and removing it. Inserting a long flat head screw driver into the hole, working it in, and turning it will pop the trunk. Unfortunately, you will have to do this everytime to open it or replace the lock.

The only other option you have is that you can sometimes 'jump' the solenoid for the trunk release from under the car. I unfortunately do not remember it's exact location, but wiring diagrams are available online. If jumped from a fresh battery, you can pop it and it will open.

Source: Fiero owner for ten years.