DIY, change the left tail light assembly on your Toyota 4Runner made in the years 1996, 1997, 1998, 1999, 2000, 2001 or 2002. For this repair you will need a 10 mm socket wrench. The whole process will not take you more than 10 minutes, because it is very simple, if you follow the next instructions.
At first, open the back door of your car and look on the left side, near the tail light, after two mounting bolts (marked with red circles in the picture below). These 10 mm bolts hold in place the tail light assembly. You can remove them using the socket wrench.
Now you will be able to detach the assembly by pulling it towards you. The piece will slip out if you move it to the left, where it has two guiding pins. In order to detach the assembly completely you will have to rotate counterclockwise the three sockets of the light bulbs and remove the wires.
Now is the time to service the light bulbs if needed. Be careful not to touch the glass surface of the replacement light bulbs if you do it. Finish the repair by installing the bulbs back into their sockets and by mounting back the tail light assembly on the frame of the car. Secure it with the two bolts and you are done. This is all you have to do, in order to change the tail light assembly on your Toyota 4Runner, produced between the years 1996 and 2002.