The ground for the ABS computer( & over-voltage relay) is on the rt shock tower. The ground for the ABS hydraulic pump is a very large braided wire just beneath the pump. Check them closely.
Does the ABS lamp come when you switch the rear window defogger on?? IF so then you need to check the charging system again.
MERCEDES Benz Master Guild Technician (6 TIMES)
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)