C3974
C3974 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.C3974 Diagnosis
The output circuits that are powered by VBAT3 will all be inoperative. Other fault codes may be present, but troubleshoot for this first. The fuse in the main PDM powering this circuit may be open.The ICU reads the wiper switch position and sends the status of the switch to the BHM. This fault becomes active when the ICU reads that both LO speed and HI speed are active at the same time.
The BHM measures the current on this circuit when the headlamp output is commanded ON. This fault indicates that the left high beam headlamp circuit is drawing more current than it is designed to supply and possibly there is a wiring fault shorting this circuit to ground.
Ford C3974 Fault Code Meaning :
Ford C3974 Symptoms :
Ford C3974 Reasons :
How To Fix Ford C3974 Trouble Code ?
Which Ford cars have the code C3974?
- C3974 Ford Aerostar
- C3974 Ford Bronco
- C3974 Ford C-Max
- C3974 Ford C-Max Energi
- C3974 Ford C-Max Hybrid
- C3974 Ford Contour
- C3974 Ford Crown Victoria
- C3974 Ford EcoSport
- C3974 Ford Econoline
- C3974 Ford Edge
- C3974 Ford Escape
- C3974 Ford Escape Hybrid
- C3974 Ford Escort
- C3974 Ford Everest
- C3974 Ford Excursion
- C3974 Ford Expedition
- C3974 Ford Explorer
- C3974 Ford Explorer Sport Trac
- C3974 Ford F-150
- C3974 Ford F-250
- C3974 Ford F-350
- C3974 Ford Fiesta
- C3974 Ford Flex
- C3974 Ford Focus
- C3974 Ford Focus Electric
- C3974 Ford Freestar
- C3974 Ford Freestyle
- C3974 Ford Fusion
- C3974 Ford Fusion Energi
- C3974 Ford Fusion Hybrid
- C3974 Ford Fusion Plug-In Hybrid
- C3974 Ford GT
- C3974 Ford Mustang
- C3974 Ford Mustang Mach-E
- C3974 Ford Mystique
- C3974 Ford Probe
- C3974 Ford Ranger
- C3974 Ford Taurus
- C3974 Ford Taurus X
- C3974 Ford Tempo
- C3974 Ford Thunderbird
- C3974 Ford Transit
- C3974 Ford Transit Connect
- C3974 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.