Will this plug directly into my existing wiring?

Yes — this mirror uses factory connector points, so it connects to your vehicle's harness without modification. If your CR-V originally had powered mirrors, the electrical is already there waiting.

Does the turn signal function work out of the box?

The turn signal housing is integrated into the mirror. Verify your vehicle's turn signal wiring is live to the mirror connector before installation to confirm the signal illuminates.

What if the power adjustment stops working after installation?

Check that the electrical connector is fully seated and not corroded. If the motor doesn't respond, trace the connector back to the dash switch and confirm continuity. A blown fuse on your vehicle's mirror circuit is the most common culprit.