The trunk lamp should be just on the top of the interior trunk where the back dashboard is. It is activated when the trunk is opened engaging the sensor inside to initiate the light to turn on. You may also find all the information needed in the owners manual which can be located in the glove compartment.
This question must be clarified. The rear lamp harness is in the trunk & trunk lid,but extends up to the fuse boxes & the dash controls.
To fix the wire for the trunk lamp of a 1999 Infiniti G20, first, locate the trunk lamp assembly and inspect the wiring for any visible damage or disconnection. If the wire is frayed or broken, strip the ends and use electrical tape or heat-shrink tubing to secure the connection. If the wire is disconnected, reconnect it firmly to the lamp socket or harness. Finally, test the lamp to ensure it functions properly after the repair.
Assuming you just need to change a lamp, open the trunk and peel away the trunk liner behind the taillight.....twist out the lampholder and there you are. Assuming you just need to change a lamp, open the trunk and peel away the trunk liner behind the taillight.....twist out the lampholder and there you are.
in the lamp assy. Mercury switch
Open the trunk, then remove the 1st and 2nd rows of black liner insert pegs. The color of the pegs may vary. Lower the trunk liner enouph to see the inside of the license plate lamp. Remove old lamp and install the new one. The job takes about 15 mins.
You butter the inside of the trunk lid and put 3 tsp. of jelly on the hood. Then say Abra-cadabra and stick some glue on your shoe and press on the gas. Ta-Da! That's how you fix it.
Open trunk, pull back trunk lining on side to be replaced. Remove three plastic wing nuts, pull tail lamp away from car body, disconnect wiring harness from tail lamp, replace defective bulb.
Look inside the trunk. Have to remove the wing nuts.
Some lights can be accessed from the trunk and some you have to take the light assy off.
I had the same problem, water was entering around lamp, sealing around perimeter worked for me.
From the rear trunk, remove carpet strip behind the lamp by unscrewing 2 plastic discs. You can then see the black plastic bulb holder assembly. Pull down on the black plastic tab on the lamp holder to release it. The complete lamp holder can then be gently guided out of the rear lamp assembly.