Will these mount directly to my existing mirror brackets?

These use factory mounting points — no drilling or bracket modification needed. Bolt straight to your door panel where the OEM mirrors attach.

Do the puddle lights come on automatically when I unlock the doors?

Yes. The puddle lights activate on door unlock and turn off after a timed delay. They're wired into the vehicle's unlock signal, so no separate switch required.

What do I need to do to wire the heating element and power adjustment?

You'll need to tap into the vehicle's power and ground circuits — refer to your F-150's service manual for mirror circuit locations and wire gauges. The connector plugs into the existing harness cavity on most stock configurations.