There is no fuse for the beeper. It's part of the cluster. You would have to remove the two breakers for the cluster and have no cluster at all, or remove the cluster and disconnect the beeper at the back of it.
Still have the warning buzzer and air guages at max, once in a while will quit wile going down road, stops when buttons pulled out, replaced mbc, air switches,checked all connectors, still have the problem, any suggestions?