Will this switch plug directly into my truck without modification?

Yes. The connector matches the factory harness on the driver door panel — no cutting, splicing, or adapter required. Snap it in and test the window before closing the door panel back up.

Does this control all four windows or just the driver window?

Driver window only. If your truck has the master control setup where the driver can lower passenger or rear windows, this switch integrates with that system — but this unit handles driver window operation. Passenger and rear switches are separate purchases.

What if the switch doesn't work after installation?

Test it immediately before reassembling the door panel. If it's dead, check your vehicle's fuse box — window switches run on a dedicated circuit. If the fuse is good and the switch still won't respond, contact support with your order number for return options.