Duel horn question

This one's for Loud or one of our other electrical tech's out there.
I have duel high/low horns on a relay. The high tone wants to work before the low tone does.
Is there a resister I can use on the high tone so the low can get enough juice to work at the same time?
All the connections are good'
Steve

Steve, are the twin horns wired sequentially/in series or in parallel from the relay?

Parallel.
Steve