Dead in the water

You could have blown the fusible link anywhere in the vehicle working under the dash. Electrical damage isn't limited to where you are working. The fusible link(s) on these cars normally comes off the big terminal on the starter relay. Do you have a factory service manual for your car? If not, go over to mymopar.com and download one. They're free and they have the factory wiring diagrams. You're just gonna have to read the diagram and see where the main feed comes through the firewall connector and use a test light and or meter. The firewall connectors in these cars are always problematic. You could have bumped the back of it and made it lose connection if it had a bad connection to start with. You're just gonna have to track it down.