Question about 1994 Ford Escort

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94 escort LX wagon 1.9L... (180,000k miles). Fan works with diagnose jump (STI to EEC), doesn't work under normal running (near overheat,etc..). Cat Conv going bad ("check engine" light 'smells funny'), could problems be related(?) and where is the "coolant temperature switch" as opposed to the "coolant temperature sending unit"? P.S. I know where the "sending unit" is... Where is the "switch"?

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As your diagnostic flow chart will tell you now you need to test the coolant sensor(3 wires sensor in water jacket screwed into steal pipe near intake manifold) Most likely out of range.If the first part of your pinpoint test had failed then there might be a possibility of and open inside the pcm but since it passed the first test then I don't think they are a related concern.

Posted on Aug 31, 2010

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2010-09-05_004249_03_focus_cooling_fan_resistor-3xudhdxidxafwe4mdbsnm14c-4-0.jpg

dual_speed_fan_diagram-3xudhdxidxafwe4mdbsnm14c-4-2.jpg

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