X3
Yeah, definitely do the hot wire from the battery test to see if the fan/s is/are indeed bad. If the fan/s turn good then you've saved yourself having to replace it/them.

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Codifex
1981 240D ChinaBlue (Got her running with a donor engine.)
1983 300DTurbo w/sunroof.
1984 300TD manual sunroof. (Electrical Gremlins)