my toyota when its in park, drive the heater dont come on the temp gauge dont wo on 1991 Toyota Camry

when its in reverse with the brake down the heater and the gauge work and reverse lights work but if not the heater,temperature gauge and reverse dont work but the r on the shifter blinks everytime i hit the brake plz help me i cant figure it out

Asked by for the 1991 Toyota Camry
maybe you have an electrical problem