Description
940002904 Cooling Fan Control Relay Module is a critical component for 2006-2011 Ford Crown Victoria models equipped with the 4.6L V8 engine. Here’s everything you need to know:
🔧 Core Specifications
✔ OEM Numbers: 940002904
Ford: 9L8Z-8C609-AA / 9L8Z-8C609-BA
Motorcraft: YH-1715
✔ Electrical Ratings:12V DC operation
70A max current capacity
Controls both low and high fan speeds
🚗 Precise Vehicle Fitment
• Ford Crown Victoria (2006-2011)
Only for 4.6L 2V V8 (Windsor) engines
Includes Police Interceptor models
• Also fits:2006-2008 Mercury Grand Marquis
2006-2011 Lincoln Town Car (verify connector type)
⚠ Failure Symptoms
▸ Most Common Signs:
Engine overheating in traffic
Cooling fans not activating
Fans stuck on high speed
Intermittent fan operation
Check Engine Light with codes:
P0480 (Fan Control Circuit 1)
P0481 (Fan Control Circuit 2)
🔌 Installation Guide
Location:
Mounted on radiator support (driver side)
Behind headlight assembly
Replacement Steps:
Disconnect battery negative terminal
Remove 10mm mounting bolt
Unplug electrical connector
Transfer fuse from old module (if applicable)
Testing:
KOEO test: Fan should run briefly at startup
With A/C on: Both fans should activate
📜 Technical Notes
• Police models may have upgraded cooling fan wiring
• Early 2006 models might need connector adapter
• Aftermarket versions may require fuse transfer
⚠ Critical Warnings
✖ Not Compatible With:
2005 and earlier Crown Vics (different PWM control)
4.6L 3V engines (Mustang, F-150)
Vehicles with dual electric fan setups
For proper diagnosis:
Check fuse #37 (50A) in engine compartment
Verify coolant temp sensor operation
Test fan motor direct power supply
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