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Cooling fan will not stop running

Tiny
DENNIS JESKE-JR
  • MEMBER
  • 2008 MERCURY MARINER
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 104,000 MILES
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.
Monday, October 30th, 2017 AT 10:22 AM

2 Replies

Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
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".
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Monday, October 30th, 2017 AT 11:59 AM
Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
Here is that wiring diagram:
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Monday, October 30th, 2017 AT 12:00 PM

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