How do you replace a 1989 ford e350 van radio?

To replace the radio in a 1989 Ford E350 van, first, disconnect the negative battery terminal to ensure safety. Remove the dashboard trim around the radio using a trim removal tool, then unscrew and pull out the old radio. Disconnect the wiring harness and antenna cable, then connect them to the new radio. Finally, secure the new radio in place, reattach the trim, and reconnect the battery.