You could watch what it was doing, while braking, by adding 4 lights or LEDs inside the car, one for each solenoid and one for the pump. Splice them into the harness near the controller at the orange, green/yellow, yellow/black, and green/red wires. Refer the solenoid indicators to blue/white for common + and refer the pump motor indicator to black (ground).
The ABS light already verifies the power relay contacts for the solenoids.
--
Art Benstein near Baltimore
“How can I answer this and stay opaque? Tina Fey
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