Sorted now. All the valves in my traction control system were fully or partially seized from infrequent use. I don't use brakes much when I drive. The fix is using super magnets from old hard drive to drag the valve stems about to free up the valves. The only cleaning agent needed is a very small amount of fresh brake fluid. A plastic pipette produces just enough pressure to push and pull the cleaning fluid inside the hydraulic block - the object in the above video.
The outlet valve to my front right wheel was fully seized in the closed position, preventing both fluid and pressure going to the wheel. While fixing that valve, I went and fixed all of the rest. The valves should click crisply when activated by magnet. None of mine clicked. Slowly, they went from no click, to dull click, to crispy click.
Super magnets that could take out a finger:
Wrap magnets in rag to control power and reduce impact damage:
The outlet valve to my front right wheel was fully seized in the closed position, preventing both fluid and pressure going to the wheel. While fixing that valve, I went and fixed all of the rest. The valves should click crisply when activated by magnet. None of mine clicked. Slowly, they went from no click, to dull click, to crispy click.
Super magnets that could take out a finger:
Wrap magnets in rag to control power and reduce impact damage: