Tailgate will not unlock after locking

Hello,

Yes, is sounds like you have a unlock relay that is not working. Here is a guide to help test it:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Here are the wiring diagrams and relay location so you can see how the system works and to replace the relay. The relay is in the interior fuse panel.

Check out the diagrams (below).

Please let us know what happens.

Cheers, Ken