U3684

U3684 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U3684 Diagnosis

The output circuits that are powered by VBAT2 will all be inoperative. Other fault codes may be present, but troubleshoot for this first. The BHM is detecting more than one smart switch with the same ID number present on the vehicle. The outputs controlled by the switch and the indicator in the switch are commanded FF.

The BHM drives the 5 cab overhead clearance and ID lamps from connector B5 pin C on circuit 46. All other marker and tail lamps are driven from BHM connector B1,K on circuit 23. This circuit connects to the CHM as an input at connector J3,P.

Ford U3684 Fault Code Meaning :

Ford U3684 Symptoms :

Ford U3684 Reasons :

How To Fix Ford U3684 Trouble Code ?

Which Ford cars have the code U3684?

  • U3684 Ford Aerostar
  • U3684 Ford Bronco
  • U3684 Ford C-Max
  • U3684 Ford C-Max Energi
  • U3684 Ford C-Max Hybrid
  • U3684 Ford Contour
  • U3684 Ford Crown Victoria
  • U3684 Ford EcoSport
  • U3684 Ford Econoline
  • U3684 Ford Edge
  • U3684 Ford Escape
  • U3684 Ford Escape Hybrid
  • U3684 Ford Escort
  • U3684 Ford Everest
  • U3684 Ford Excursion
  • U3684 Ford Expedition
  • U3684 Ford Explorer
  • U3684 Ford Explorer Sport Trac
  • U3684 Ford F-150
  • U3684 Ford F-250
  • U3684 Ford F-350
  • U3684 Ford Fiesta
  • U3684 Ford Flex
  • U3684 Ford Focus
  • U3684 Ford Focus Electric
  • U3684 Ford Freestar
  • U3684 Ford Freestyle
  • U3684 Ford Fusion
  • U3684 Ford Fusion Energi
  • U3684 Ford Fusion Hybrid
  • U3684 Ford Fusion Plug-In Hybrid
  • U3684 Ford GT
  • U3684 Ford Mustang
  • U3684 Ford Mustang Mach-E
  • U3684 Ford Mystique
  • U3684 Ford Probe
  • U3684 Ford Ranger
  • U3684 Ford Taurus
  • U3684 Ford Taurus X
  • U3684 Ford Tempo
  • U3684 Ford Thunderbird
  • U3684 Ford Transit
  • U3684 Ford Transit Connect
  • U3684 Ford Windstar

A code is a fault code and it indicates that something has gone wrong with your car's engine.

It can be caused by many different problems, including a faulty battery, a bad fuel pump, or even a cracked exhaust manifold.

You will need to diagnose the problem before you can fix it. The best way to do this is with an OBD scanner tool.

A scan tool will tell you what needs fixing and how much it will cost in order to fix that particular issue.