Did a search and couldn't find anything that I haven't tried short of replacing major components. My ABS light is on and I have done the following:
1.) Swapped out OVP: did not help
2.) Swapped out black BOSCH relay under ABS casing: did not help
3.) Swapped out metal relay under ABS casing: did not help
4.) Cleaned both magnetic front ABS sensors: did not help

Any suggestions?

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1990 190E 3.0L