P3778

P3778 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P3778 Diagnosis

This fault indicates that the circuit is drawing more current than it is designed to supply, and possibly there is a wiring fault shorting this circuit to ground. The fault remains active until the ignition is turned ON when the fault is no longer present.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 P3778 Fault Code Meaning :

Ford P3778 Symptoms :

Ford P3778 Reasons :

How To Fix Ford P3778 Trouble Code ?

Which Ford cars have the code P3778?

  • P3778 Ford Aerostar
  • P3778 Ford Bronco
  • P3778 Ford C-Max
  • P3778 Ford C-Max Energi
  • P3778 Ford C-Max Hybrid
  • P3778 Ford Contour
  • P3778 Ford Crown Victoria
  • P3778 Ford EcoSport
  • P3778 Ford Econoline
  • P3778 Ford Edge
  • P3778 Ford Escape
  • P3778 Ford Escape Hybrid
  • P3778 Ford Escort
  • P3778 Ford Everest
  • P3778 Ford Excursion
  • P3778 Ford Expedition
  • P3778 Ford Explorer
  • P3778 Ford Explorer Sport Trac
  • P3778 Ford F-150
  • P3778 Ford F-250
  • P3778 Ford F-350
  • P3778 Ford Fiesta
  • P3778 Ford Flex
  • P3778 Ford Focus
  • P3778 Ford Focus Electric
  • P3778 Ford Freestar
  • P3778 Ford Freestyle
  • P3778 Ford Fusion
  • P3778 Ford Fusion Energi
  • P3778 Ford Fusion Hybrid
  • P3778 Ford Fusion Plug-In Hybrid
  • P3778 Ford GT
  • P3778 Ford Mustang
  • P3778 Ford Mustang Mach-E
  • P3778 Ford Mystique
  • P3778 Ford Probe
  • P3778 Ford Ranger
  • P3778 Ford Taurus
  • P3778 Ford Taurus X
  • P3778 Ford Tempo
  • P3778 Ford Thunderbird
  • P3778 Ford Transit
  • P3778 Ford Transit Connect
  • P3778 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.