B3781

B3781 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

B3781 Diagnosis

The CHM does not suupport PWM type DRLs. The vehicle has a BHM mismatch with the CHM. Replace the CHM with one that is compatible with the BHM.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 B3781 Fault Code Meaning :

Ford B3781 Symptoms :

Ford B3781 Reasons :

How To Fix Ford B3781 Trouble Code ?

Which Ford cars have the code B3781?

  • B3781 Ford Aerostar
  • B3781 Ford Bronco
  • B3781 Ford C-Max
  • B3781 Ford C-Max Energi
  • B3781 Ford C-Max Hybrid
  • B3781 Ford Contour
  • B3781 Ford Crown Victoria
  • B3781 Ford EcoSport
  • B3781 Ford Econoline
  • B3781 Ford Edge
  • B3781 Ford Escape
  • B3781 Ford Escape Hybrid
  • B3781 Ford Escort
  • B3781 Ford Everest
  • B3781 Ford Excursion
  • B3781 Ford Expedition
  • B3781 Ford Explorer
  • B3781 Ford Explorer Sport Trac
  • B3781 Ford F-150
  • B3781 Ford F-250
  • B3781 Ford F-350
  • B3781 Ford Fiesta
  • B3781 Ford Flex
  • B3781 Ford Focus
  • B3781 Ford Focus Electric
  • B3781 Ford Freestar
  • B3781 Ford Freestyle
  • B3781 Ford Fusion
  • B3781 Ford Fusion Energi
  • B3781 Ford Fusion Hybrid
  • B3781 Ford Fusion Plug-In Hybrid
  • B3781 Ford GT
  • B3781 Ford Mustang
  • B3781 Ford Mustang Mach-E
  • B3781 Ford Mystique
  • B3781 Ford Probe
  • B3781 Ford Ranger
  • B3781 Ford Taurus
  • B3781 Ford Taurus X
  • B3781 Ford Tempo
  • B3781 Ford Thunderbird
  • B3781 Ford Transit
  • B3781 Ford Transit Connect
  • B3781 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.