Unlikely to be a BECM issue. The SRS lamps are controlled through the small blue connector on the bottom/LHS of the cluster.
Everything else is controlled through the big black connector on the bottom/RHS of the cluster. I'd be checking that's fully plugged in and seated properly.
Everything else is controlled through the big black connector on the bottom/RHS of the cluster. I'd be checking that's fully plugged in and seated properly.