1990 Dodge Ramcharger turn key no power

Hey I replaced the transmission 2 days ago, took it out for a couple test drives performed flawlessly. I took it out today and drove it around for about 20 mins and pulling up to my drive way it stalled out. Turn the key to the on position and nothing. The interior lights, horn, headlights, tail lights all work but the radio and any sign of ignition. I replaced the battery because it was old and I replaced the starter relay and still turn the key and nothing no dash lights or any sign of life. I would greatly appreciate any help I can get thanks.