At least you got the right antenna adapter! ANYWAY.............

Now, determine the pinout of the plug on the car's harness and then look at your adapter and how it is connected/wired to the new head unit and make sure you have it configured for the car's harness. In the Limited (which you obviously have) you need:

• All eight wires in Plug "B"
• Many of the wires in Plug "A"
• You need a switched output from the new head unit to enable the amplifier and power the preamp in the antenna (if you want the radio to work) - see the diagrams below. Most (maybe all?) modern aftermarket units have an output for driving the preamp and amplifier, look in your manual for it.

You can't do this unless you understand what the wires all do. Maybe these will help: