When I bought my 6.5 diesel a few years ago there was a Banks Boost/EGT gauge combo installed. The boost was hooked up and works. The EGT had a wire running to the engine bay but no probe installed (nor probe that came with the vehicle). So I did a bit of research and to me, it seemed like any Type K thermocouple should work. So I purchased one off eBay and installed the probe. The wire from the gauge had two ring terminals and the thermocouple wires (two total) were like plugs/pins. So I stripped the ring terminals to crimp together. Obviously something is hooked up incorrectly because the gauge doesn't work. As best as I can tell the gauge is just a mechanical type thermocouple. When I stripped the ring terminals the yellow wire was just a small wire but the red wire had a small wire plus a thicker almost ground looking wire inside but both went to the ring terminal.

So, any pointers on what I can do to get the gauge hooked up and work? I found the Banks website with install instructions but they just state connect wires to probe. No diagrams.

Thanks!

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2009 ML320 Bluetec
1985 300CD
1981 300TD

Past Mercedes
1979 300TD
1982 300TD
2000 E320 4Matic Wagon
1998 E430
1984 300SD
1980 300SD