Kia 9386039003 Back Up Lamp Switch Assembly

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The backup light switch is on the transaxle's front side. Turn the ignition key to On and shift to Reverse to activate the backup lights. If they don't turn on, check the fuse. If the fuse is fine, check for voltage on the battery side of the switch; if there's no voltage on the ground side, replace the switch. Unplug the connector, remove the old switch, test the new one, install it, and reconnect the connector. Check the circuit's functionality. If one bulb is out, replace it. If both are out, the issue could be the wire between the switch and bulbs.

Turn the ignition key to the On position and move the shift lever to the Reverse position to close the back-up light circuit and turn on the back-up lights.