Hi and thanks for using 2CarPros.
First, under the hood in the power distribution box, locate fuse RR park fuse. It has its own fuse. It should be fuse 29.
I attached two pics from a wiring schematic. Also, the fuse box to help you locate the fuse. If the fuse is good, all tail lights ground at the same place, but they are spliced together. Check to make sure nothing is corroded or disconnected. See the schematic for location.
https://www.2carpros.com/articles/how-a-car-fuse-works
https://www.2carpros.com/articles/how-to-check-a-car-fuse
Let me know what you find and if this helps.
Take care,
Joe
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Monday, November 26th, 2018 AT 2:21 PM