Haha. Brake. Reg board throwing out 289 vdc to brake coil. Ouch. Other guy swappee the reg board. But not the rectifier or igbt part of the brake regulator. Igbt was shorted on one gate. Output volrage too high. Reg card saw this after 4 seconds and opened output of card that goes to bki input. Car stops. Error 154. Brake reg board defective. Bang on.