i just cleaned my engine this morning...didnt get too involved in it, i just covered the turbo and sprayed it down with Gunk, and then pressure washed it off....my main area of focus was the valve cover and the sides of the block, i tried to stay relatively clear of all the electric stuff in the fenderwells....i let it sit for about 30 minutes after i was done, i also made some adjustments to my boost controller...then i took it for a drive....as soon as i turned the key over to let the glow plugs warm, the auxillary fan turned on and it stayed on the whole time i was driving....and it still kicks on whenever i turn the key over... it hasnt been working, AFAIK, for a while now...anyone know what i could have done to make it stay on?

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1985 300SD 192,000miles...Astral silver/ Grey MbTex

1983 300D 194,000miles...White/Tan MbTex...my newest addiction

in engine temperature sensor = reading engine over heat = comand aux fan on all the time.

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ok, thanks whunter...so what should i do about a cure? replace the sensor? is that the piece down on the side of the block between two of the glow plugs with the wire that snaps on?

__________________
1985 300SD 192,000miles...Astral silver/ Grey MbTex

1983 300D 194,000miles...White/Tan MbTex...my newest addiction

disconnect one engine sensor wire at a time for ten seconds.
When the fan goes off, you have the correct sensor.
If the fan does not go off, you missed a sensor, or there is a wire short to track down.