First CONFIRM fuse F1.10 (30a) is good.
Test the TN/WH wire on the head light switch. Should have +12 volts at all times. If not, fuse F1.10 is blown or there is a wiring harness problem.
F1=BJB=Battery Junction Box-located engine bay
F2=CJB=Central Junction Box-located driver's kick panel.
There is a ground behind the center console. It is shared with the radio and several other devices (cluster, GEM, blower motor). Confirm that all grounded black wires were re-attached after the radio install.
Note to self: Many circuits in today's cars are on "always on" circuits. Remember to disconnect the battery negative when performing electrical work. Could save a ton of time.
2003 GT Convertible (sold & missed)
2000 GT coupe (Craigslist project. Fixed. Now my DD). Windsor to Romeo swap.