I am in the process of resurrecting a 190D.
My alternator was not charging the new battery. My alternator light was also on (along with the brake, oil and coolant lights dimly).
Today I removed the alternator and brought it in for testing/swapping. It tested slightly weak, so I replaced it with a new, rebuilt unit. The alternator is still not charging and the same lights are on as above. My sense is something is not wired right. The wires at the back of the alternator are clean and in good shape. I was sure to make the connections correctly.
I realize that sometimes new, rebuilt units are faulty, but is there something I can do to test the alternator and its circuit so I do not have to pull it it out right away for testing?
When I bought the car the two wires (found in post 1 here:
1986 190d Intro, No-Start, Etc. disconnected from the X35 block near the battery. Connecting those gave me juice to the gp's. Could those two wires have something to do with my issue?
Thanks in advance for any thoughts or suggestions. Michael