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Old 04-21-2006, 02:18 PM
orthotomeo's Avatar
Ex-Diesel Enthusiast
Join Date: Jan 2006
Location: BC, Canada
Posts: 126
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!
1980 300D 300K KM - parting out
1979 300D 375K KM - parting out
2 300Ds for sale
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Old 04-21-2006, 02:24 PM
Registered User
Join Date: Sep 2004
Posts: 8,549
I have the '82 diagrams.
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Old 04-21-2006, 03:05 PM
junqueyardjim's Avatar
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Join Date: Apr 2005
Location: Cicero, Hamilton County, Indiana about 30 miles north of downtown Indianapolis
Posts: 2,609
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.
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Old 05-04-2006, 10:48 AM
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Join Date: Jul 2004
Location: central Florida
Posts: 59
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
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