comments:
red_pencils posted on r/mechanicadvice3w
Mechanic here: if the reverse lights are stuck on, then pulling the plug off the switch should shut them off if the issue is a faulty switch. That looks like the right location for the switch on a sonata. Pretty sure it's ground side switching from memory. Simple circuit. If that has no effect then the circuit is being completed elsewhere in the chain - time to get out the test light and/or the multimeter. It's possible it could be the plug but unlikely IMO. Pretty sure this is what you're after: https://www.amazon.com/Pin-Connector-compatible-A71A2-CE2090F/dp/B0D15QGS76 Happy hunting!