How to Install Poison Spyder 24 in. LED Back-Up Light Extension Harness - Pair on your Wrangler

NOTE: Installation assumes the use of 4” round LED taillights and 2-1/2” round LED back-up lights sold by Poison Spyder Customs. Other manufacturers’ lighting products may also be compatible, however they are not guaranteed to work with this harness. 

1. Park vehicle on a level surface, place the transmission in gear or park, and set the emergency brake. Wear safety glasses from this point on.  

2. Beginning on the passenger side, use a Phillips screwdriver to remove the stock taillight assembly from the Jeep. Note that there are four screws, one in each corner of the taillight housing. You only need to remove the two inboard screws. Once these two screws are removed, grip the taillight assembly, slide it slightly toward the center of the Jeep and pop it out.  

3. With your thumb, press on the release tab of the taillight harness plug, and separate it from the vehicle harness. Set the OE taillight assembly aside.  

NOTE: At this point, provisions will have to be made for physically mounting the 4” round LED taillight. In most cases, this means installing Poison Spyder Crusher Corners. Instructions for doing that are not included here. These instructions continue with the assumption that the Jeep is now ready to mount the 4” round LED taillights (and 2-1/2” round reverse lights, if applicable) 

NOTE: If installing Poison Spyder’s LED License Plate & 3rd Brake Light in conjunction with this installation, insert the procedures included with that product into the installation process here. 

4. Plug the Poison Spyder LED Taillight Harness into the OE taillight connector.​

5. Secure the gold anodized resistor heat sink into place inside the Jeep’s corner cavity. This may be done by using a couple of small self-tapping sheet metal screws and a long driver extension for your drill, to secure it to the flat surface inside the cavity. Be sure not to chose a surface where the ends of the sheet metal screws will protrude into the Jeep’s interior.

6. If installing the LED License Plate & 3rd Brake Light, route the long gray license plate light lead to wherever you are going to mount the license plate light, typically at the center of the spare tire on the spare tire carrier. To route the wire to the exterior of the Jeep, reach inside the Jeep’s corner cavity, down to the “floor” inside. There is a hole in this floor under a thick piece of foam insulation. This hole can be used to route the wiring to the exterior of the Jeep.  

7. Route the back-up light extension harness(es), if needed. There are two plugs provided on the harness for these. For backup lights mounted down in the bumper, use the 24” extension harnesses and route through the hole in the floor of the corner cavity as described in the previous step. For backup lights mounted below or next to the LED taillight, use the short 4” extension harness. If no backup lights are used, simply leave the plastic plugs in place on the harness.  

8. wiring in place, both inside the Jeep’s corner cavity and wherever extension wires have been routed.  

9. Plug the 4” LED taillight into the harness, push the remainder of the harness through the taillight hole, and install the taillight with its rubber grommet  

10. Repeat these steps for the driver’s side harness (omitting the procedures for the LED License Plate & 3rd Brake Light).  

Congratulations, you have completed the installation of your Poison Spyder JK LED Taillight Harness!