WATER INGRESS · BODY MODULES · ELECTRICAL DIAGNOSIS
When a vehicle develops electrical faults after a leak, the repair enquiry needs to cover both the damaged electronics and the route the water took. A replacement module alone may leave the original cause unresolved.
A documented Ford Focus example
HELLA describes electronic failures on the Ford Focus 1.6i, engine code PNDA, model years 2010–2014. In that specific case, washer fluid could travel from a leaking washer pump through the wiring to interior electrical connections and the control unit. The guidance includes checking the affected connections and repairing damaged wiring alongside the identified cause.
This example shows why the full vehicle history matters. It does not establish that every Focus fault, or every wet module, has the same cause. Source HELLA Ford Focus electronic failures.
Information that helps the assessment
- When it started after rain, a wash, a windscreen repair, a spill or another event.
- Where moisture was found footwell, luggage area, engine bay, module housing or a connector. Send photographs taken before cleaning where available.
- Which functions fail describe the actual symptoms and whether several appeared together.
- What has been done drying, connector cleaning, battery work, module swaps or previous repairs.
- Identification vehicle details, full module label, scan report and whether the unit communicates.
Should I open or power the module?
Ask the repair team first. Avoid opening, heating or applying chemicals to a unit simply to prepare it for an enquiry. If a removed module is visibly wet, do not reconnect it just to see whether it works. Vehicle isolation and removal should follow the manufacturer’s procedure and be handled by a suitably equipped technician.
Repair, data recovery or replacement?
Contact us to discuss assessment of the original unit. The condition of the electronics and available data determines whether repair or a supported donor route can be considered. Photographs help explain the history, but cannot establish the full extent of internal damage or guarantee recovery.
Keep the original module and send both labels if you have a replacement. Our BCM and BSI service, FRM and SAM enquiries and module data recovery pages explain the available starting points.
Before refitting
Ask your garage to confirm that the water-entry source and affected vehicle wiring have been dealt with. Agree any coding and installation requirements before the assessed or replacement unit goes back into the vehicle.
Arrange the enquiry
AXION Automotive is based in Didcot, Oxfordshire. Contact us before sending any water-damaged unit so packaging and assessment suitability can be agreed. High-voltage EV components and traction batteries need a separate handling discussion and must not be posted using the ordinary module route.