Author Topic: Another not charging post  (Read 659 times)


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  • W116 Enthusiast
  • Location: Stouffville
Another not charging post
« on: 29 April 2021, 05:35 PM »
1980 300SD

- No increase of voltage running (not charging)

- grounded the D+ or blue wire (No light on dash)

- all other lights on dash (signals, high beam, etc) work except, seat belt warning and the dimmer lights.

- everything else power works (windows, locks)

12 volts at the two red wires at the ALT.

I understand that the system only works if the blub is active, I have about 10-11 volts at the D+ (blue) at the cluster with ignition on.

I have a new voltage reg on order, anything else I should be looking at?