Guage Cluster flashes when brakes are pressed on 2001 Cadillac Eldorado

When hitting the brakes to put car in gear or stop car, the gear indicator lights flash, radio goes off, and fan will kick on high on it's own. checked fuses, any other ideas would be appreciated.

Asked by for the 2001 Cadillac Eldorado
There is a bulletin for the Instrument panel wiring harness repair. It is 06-08-45-004, so GM knows that these vehicles have wiring harness problems with their instrument clusters.