Follow this two flowcharts. First check if you have any DTC store for the ABS. If the ABS light doesn't start blinking after one blink, you don't have any error stored. If you have an error, check that first. If the light is constantly on and doesn't enter in the DTC mode, you have a faulty ABS Module. If you don't know how to read ABS faults, just check the manual in the ABS section.
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