Constant audible tone that increases with speed

Hi. Hoping to get some idea of what may be going on with our 2010 Prius. The hazard lights began flickering eratically and in step with the speed of the vehicle. Not able to stop them even when the car was turned off. After some research online regarding the skid control ecu issue switching the hazards on and off I snipped the pale blue Pin 10 wire and the hazards stopped immediately. I had full control of turn signals and hazards and all was fine until a few minutes into driving there was an audible tone that kind of juttered into existence, meaning it sounded like it was kind of connecting/ disconnecting a few times until it established itself as a consistent beep tone that when stationary, stayed on , but when moving, it began to beep instep with the vehicles speed, just as the hazards had done, only now it was an audible tone. Lots more research and I cannot find anyone online with the same issue as this. The beeping goes away when i disconnect the skid ecu wiring plug, but that makes the car inopperable anyway so not a solution. any advice would be very welcome. TIA !!