U3643

U3643 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U3643 Diagnosis

The fault remains active until the ignition is turned ON when the fault is no longer present. Some BHM configurations force this circuit off until the ignition switch is cycled.Determine if the extra switch is not required for the vehicle or if the switch has been installed but the necessary reference parameter has not been programmed into the BHM.

This circuit connects to the CHM as an input at connector J3,P. The CHM passes the signal through to power the tail lamps and marker lamps from connector C2 pin G and also from connector C1 pins D, E, and F.

Ford U3643 Fault Code Meaning :

Ford U3643 Symptoms :

Ford U3643 Reasons :

How To Fix Ford U3643 Trouble Code ?

Which Ford cars have the code U3643?

  • U3643 Ford Aerostar
  • U3643 Ford Bronco
  • U3643 Ford C-Max
  • U3643 Ford C-Max Energi
  • U3643 Ford C-Max Hybrid
  • U3643 Ford Contour
  • U3643 Ford Crown Victoria
  • U3643 Ford EcoSport
  • U3643 Ford Econoline
  • U3643 Ford Edge
  • U3643 Ford Escape
  • U3643 Ford Escape Hybrid
  • U3643 Ford Escort
  • U3643 Ford Everest
  • U3643 Ford Excursion
  • U3643 Ford Expedition
  • U3643 Ford Explorer
  • U3643 Ford Explorer Sport Trac
  • U3643 Ford F-150
  • U3643 Ford F-250
  • U3643 Ford F-350
  • U3643 Ford Fiesta
  • U3643 Ford Flex
  • U3643 Ford Focus
  • U3643 Ford Focus Electric
  • U3643 Ford Freestar
  • U3643 Ford Freestyle
  • U3643 Ford Fusion
  • U3643 Ford Fusion Energi
  • U3643 Ford Fusion Hybrid
  • U3643 Ford Fusion Plug-In Hybrid
  • U3643 Ford GT
  • U3643 Ford Mustang
  • U3643 Ford Mustang Mach-E
  • U3643 Ford Mystique
  • U3643 Ford Probe
  • U3643 Ford Ranger
  • U3643 Ford Taurus
  • U3643 Ford Taurus X
  • U3643 Ford Tempo
  • U3643 Ford Thunderbird
  • U3643 Ford Transit
  • U3643 Ford Transit Connect
  • U3643 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.