Cooling fan will not stop running

2008 MERCURY MARINER
104,000 MILES • 4 CYL • 2WD • AUTOMATIC
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DENNIS JESKE-JR
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One of the two cooling fans does not stop running until the battery is drained. I disconnected the battery, but the fan starts right back up when battery is reconnected.
Oct 30, 2017 at 10:22 AM
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PATENTED_REPAIR_PRO
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Try removing fuse F16 or F17 in the battery junction block and depending on which one allows the fan to shut off, try a new fan relay. if fuse F16, replace the "cooling fan relay" in the battery junction block but if fuse F17. try a new "low speed fan control relay".
The only other fan relay is the "high speed fan control relay".
Oct 30, 2017 at 11:59 AM
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PATENTED_REPAIR_PRO
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  • ASE Certified Mechanic
Here is that wiring diagram:
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
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Oct 30, 2017 at 12:00 PM
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