2016 Spark 3-Up won't read key

[mtmusaf]

Hooked up key to my 2016 3-Up Spark and got continuous “Reading” scrolling across instrument panel. Same with the “Green” key. Magnet would also activate the instrument panel when placed near the key post. Thought it might be the key post so swapped out with another one I picked up on ebay. Same thing except now I get nothing on the instrument panel from the keys connected to the post or a magnet touching the post. Battery is good. Ideas? Wiring harness?