What year?
Well, here's some things to check.
I don't know about the earlier ones bit the later models have a single fused line to the blinker circuit. If one blinker works, the other one should work too.
Be sure your ground connection inside the pod is a good one.
If it's a late model, you MIGHT have a bad connection on the bottom of the fuse panel. Drop it down, remove 2 screws, and unplug/replug the sockets to refresh the connection.
Also, you might have an issue with the steering console switch assembly. The only thing you can repair there is the connections underneath the steering column.