I conducted a brief review but did not find anything that aligns with my specific circumstances, so I decided to submit in hopes of receiving insight or being directed to the appropriate resource.
I possess a 2004 Mondeo MK3 Ghia X equipped with a 3.0L V6 Duratec engine. The problem is that while driving, the interior electronics (as detailed below) and the headlights intermittently activate and deactivate, which is clearly problematic.
I initially believed the battery was failing; however, upon testing, it registered 13 volts after remaining idle without the engine running for a whole day.
The battery measures 14 volts with the engine running and 16 volts with the headlights activated, indicating that the alternator appears to be functioning properly.
Consistently initiates on the first attempt and engages and disengages properly.
I suspect the problem may stem from a loose connection; nevertheless, I am not a mechanic and lack certainty.
The brake lights function properly and have never malfunctioned, even when all other systems are deactivated; this same applies to the indicators, power steering, and the engine.
I am pleased to address enquiries and furnish further information if required.
Have any similar difficulties been observed? Is there anyone who can identify a probable cause?
Devices that have been activating and deactivating intermittently:
Dash cluster (all gauges simultaneously)
Power windows
Climate-controlled seats
Blower fans
Thermal displays
Radio or head unit
Headlight assembly (comprising sidelights, dipped beam, and main beam integrated into a single unit)
Thank you for any responses.