Dash master harness wiring diagram
 

I took out my dash to repair the odometer (thanks dieselgiant), but when I took off the master harness the back cover popped off and the wires popped out of the harness connector. I tried to connect it the way I thought it came out, but now my fuel and temp gauges don't work (let alone the turn lights etc).

Does anyone have a wiring diagram for the harness on a 300d?

Thanks in advance!

I have the '82 diagrams.

You have a ground problem
 

If those gauges don't work, most probably you have a ground problem. Try getting your fingers down around the lower corners of the instrument panel and "teak" it in or out just a little.

gauges on 300D instrument panel
 

A while back my gauges, temp and fuel were going crazy always oscillating from min to max. I experimented around moving inst. panel in and out of dash. On my 84 300D by leaving top right corner out slightly, the gauges are stable and read approximately correct. bubba z