I replaced my main relay due to intermittent no-start. Now the horn won't blow and the auto trans won't unlock without manual key.

When I replaced the main relay, I did not remount to side wall. Tied to a cooler spot under dash.

Did I do something wrong? Simple as a fuse?

Thanks

Found the problem. Blown 20A fuse in UHFB.

Congratulations for solving the problem yourself and thanks for letting us know what was the problem.