2013 Jeep Wrangler Unlimited. Rear left turn signal and brake lights stopped working.?

First it was intermittent with the blinker. I replaced the blinker bulb and it was okay for a few weeks. Now both are out all of a sudden. I have unplugged and plugged multiple times in hopes of clearing moisture and or correcting a bad connection. No effect. Is there something else that goes in these?
Update: There's a circuit board in it that tends to go bad. I ordered a whole new unit
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