Dash lights and turn signals

More than likely this is a relay issue.

If you take a look at the turn signal relays, they are all feeding the next. So that means we need to check the power that is feeding them which is coming directly out of the front control module.

So, if you have power on the Brake lamp switch output then the FCM is not the issue.

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

So, let's start with checking the power and then the relays and we can go from there.

Thanks