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?