I think All Later trunk latches are already wired for a light because same switch on latch for ajar light.
All needed is a light between C500 H9 orn/dr blu for power and F8 wht/orn to switch for 88 Fiero (Colors for Body side of C500)
Factory truck light is fairly useless because where installed. Often is buried by whatever cargo and/or blinds you opening in dark.
others have added using different lights, LED strips, etc.
small section(s) of strip LED under the trunk seal on latch side might work better. Doesn't have to be very bright either.
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
The Ogre's Fiero Cave