Installed a triple a beam gauge cluster.

Recently got my car back on the road, all taillights worked for about a week. Can’t tell you the exact time frame to where they stopped. Checked most the wiring, fuses, and bulbs all are good. What else could it be? Also does anyone know if the wire cluster under the dash on the passenger side contains the wires from the fuse box?

 

sounds like you might have a ground issue if not the fuses or the bulbs.
check the wiring in the trunk, move the wires around see if something is shorting out.