83 300SD instrument cluster plug wiring diagram
 

While removing my instrument cluster to change the ignition lock, I pulled on the top half of the round wiring plug at the rear of the instrument cluster to disconnect it, the top 1/2 with the wires pulled off, but left the plug loose with all the wires pulled loose. Does anyone have a wiring diagram showing which color of wire goes to which pin location? The round plug I am referring to has 14 or 15 pins and plugs into the cluster at the rear closest to drivers side. Any assistance would be much appreciated as car cannot be driven with 0 instruments.:mad::confused:

15 Pole Couplings of Instrument Cluster Up To 07/85
 

I believe this is what you are looking for! :)

15 Pole Couplings of Instrument Cluster Up To 07/85

1. Not in use
2. Temperature Transmitter Coolent - Green
3. Sensor Fuel Readout - Blue / Black
4. Sensor Fuel Reserve Readout - Blue / Green
5. Instrument Lights Input Terminal K - Gray / Purple
6. Indicator Light High Beam - White / Blue
7. Indicator Light Ingition Terminal 15 - Blue / Red
8. Instrument Lights Output Terminal 68d - Gray / Blue
9. Indicator Light Ingition Terminal 61 - Blue
10. Indicator Light Brake Lining Wear Indicator - Brown / Red
11. Indicator Light Parking Brake - Brown / Red / White
12. Voltage Supply of Indicators Terminal 15 - Black / Blue
13. Not In Use
14. Not In Use
15. Oil Pressure Transmitter - Brown / Green

Hope This Helps! :D

William:
Thank you very much for taking the time to respond to my problem. The info you posted looks like exactly what I need.
John:)

Glad I could help let us know how it works out.