ABS light on after changing rear diff - need help
 

I just finished installing a late 87 190E 16 valve diff (3.27:1 LSD w/ABS) and now my ABS light is on and it appears that ABS is not working.

I did not use my original speed sensor in this diff, I used the speed sensor that came with the 16 valve diff, the two sensors were not quite idential, one being longer than the other and one having a small protruding tip.

So my question is: Should I have used my original speed sensor in the 16 valve diff or could the 16 valve speed sensor I am using just be defective? I have to assume this is the cause of the ABS malfunction, as everything was just fine before the diff swap.

Any assistance would be appreciated.

Anyone?

sensor air gap? or maybe a bad sensor/wiring fault?