2019 & 2020 Rear Antenna Install
This will help guide you through the basic process of adding the rear antenna to a 2019-2020 5TH-Gen 1500. Whether you use your own wiring, or replace the entire rear fascia harness, the antenna location will be the same. If using the factory harness, it’s going to be plug and play so just remove and replace the entire thing. If you’re just adding the 2 wires needed, then follow the steps below.
To add the two wires and connector for the rear antenna, start by finding the connector below, which is where the rear fascia connector plugs in to the body harness. It's right above the rear resonator on the driver's side.
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To unplug it, pull up on the little yellow tab and then the red piece will slide out. If the connector doesn’t pop off, you haven't pulled the red piece out enough. It will disengage on its own once you slide it out far enough.
Once unplugged, remove the first couple of clips from the frame so you have some slack, then remove the black cover from the backside of the rear fascia connector. You should be looking at something like this, and we will be working with terminal positions 19 and 20. Position 19 is the "PASSIVE ENTRY ANTENNA 5 SIGNAL" and position 20 is the "PASSIVE ENTRY ANTENNA 5 RETURN". Refer to the photo at the end of this post which shows the antenna connector and which wire is which.
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There will probably be little plugs in the terminal positions, so you need to push them out. If you have a tool for depinning connectors, slide it in the terminal positions from the face side of the connector (photo directly below) and the plugs will push right out. If you do not have one, a small piece of wire or a paperclip will likely work just as well.
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Once the plugs are out, before you can insert the terminals from your new harness, there is a plate that needs to be slid out of the way. In the photo below you can see it slid out of the connector, to the opposite side of the one you moved to unplug it. A small flathead should be all you need to get it started and then just slide it out far enough to access the positions you need.
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After that you can insert the new terminals into the backside of the connector. Don't force them in, they should go in with very little effort if they are oriented correctly. You will hear them click into place when they are seated. Once they're both in, slide the red tray back in.
You can then install the black cover on the back of the connector, and route your wiring however you choose over to the antenna. I ran the new harness inside the first section of wire loom so that it was contained in the black cover like all the rest, then I taped it all up and just ran the wires alongside the factory harness.
The photo below shows where the antenna mounts in a little cubby behind the center of the rear bumper. If you look up from under the truck, between the spare tire and bumper you will see it. If you drop the spare down you will have room to work and come up with a way of securing it with clips or small bolts.
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