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Old 07-11-2003, 07:31 PM
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csnow csnow is offline
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Join Date: May 2002
Location: Mass
Posts: 1,127
Start by jumping the plug terminals at the coolant sensor on the head (usually green or blue). If the fan comes on, the fan is working (obviously), and the problem is clearly on the 'A/C kickin' side of the equation.

If the fan does not start, try providing 12volts directly to the fan motor to see if it turns.
1986 300E 5-Speed 240k mi.
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