Help Headlight’s keep turning on!

[Nedge68]

Hi Funsters,
Found my cab battery warning light flashing this morning, then noticed headlights were on, ignition was off, dash in darkness. Turned then off, only to be told they had come back on again, engine started ok and now at Chatsworth for 2 nights. The lights keep turning back on, went to set the non-starter but got error telling me it won’t block as the Ignition is ON. Strange when the key is in my pocket. Called Vanbitz and MetaTrak and now booked in with dealer, I have disconnected the battery negative to stop the battery draining. Any ideas anyone? Battery is current showing 12.43V Ford transit Mk8 2022

 

[EricS]

Hi Funsters,
Found my cab battery warning light flashing this morning, then noticed headlights were on, ignition was off, dash in darkness. Turned then off, only to be told they had come back on again, engine started ok and now at Chatsworth for 2 nights. The lights keep turning back on, went to set the non-starter but got error telling me it won’t block as the Ignition is ON. Strange when the key is in my pocket. Called Vanbitz and MetaTrak and now booked in with dealer, I have disconnected the battery negative to stop the battery draining. Any ideas anyone? Battery is current showing 12.43V Ford transit Mk8 2022

Hi
There have been a number of reports of this happening on Chausson motorhomes, it would appear that condensation can run down the inside of the windscreen and get into the 'body control module'. Not sure if this would be your problem given the recent warm weather, but something to check.

 

[Pausim]

Not sure if this would be your problem given the recent warm weather, but something to check.

Plenty of rain at Barnard Castle when I was there last week.

 

[Nedge68]

Hi EricS
I will get the BCM checked had some heavy condensation the other morning…

 

[Sasbo]

Does your Mk8 have the auto headlights option. If so, disable on the rotary light switch.

If it doesn't, ignore this!!

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[ROCHESB]

We had a similar experience with a Transit MK7 based Hobby van we had some years back. In our case it was caused by water getting into a socket under the van (intended for towing electrics wiring loom) that was wrapped in a plastic bag which had filled up with water. In our case we had problems turning the engine off too, I had to stall it to stop. We had both lights and wipers activating by themselves too.

 

[Nedge68]

been to the dealers today but they were unable to find anything, which I appreciate is difficult because the fault wasn’t showing when they had it, hopefully just a CANBUS gremlin that won’t happen again, here’s hoping…
EricS where did you hear about a number of reports?

 

[EricS]

been to the dealers today but they were unable to find anything, which I appreciate is difficult because the fault wasn’t showing when they had it, hopefully just a CANBUS gremlin that won’t happen again, here’s hoping…
EricS where did you hear about a number of reports?

This was reported on the Chausson owners group Facebook page. I will not copy across from that page as it is a private group. However some detail below.

"With further discussion with Ford the source of the short is the C311 connector which is located on the passenger side of the van in the dash under the cup holder. " "This happens from condensation from the windscreen" "This damage causes the BCM to go into safe mode. The flashing headlights indicates this."

Hope this helps

Eric

 

[Nedge68]

This was reported on the Chausson owners group Facebook page. I will not copy across from that page as it is a private group. However some detail below.

"With further discussion with Ford the source of the short is the C311 connector which is located on the passenger side of the van in the dash under the cup holder. " "This happens from condensation from the windscreen" "This damage causes the BCM to go into safe mode. The flashing headlights indicates this."
View attachment 666246
Hope this helps

Eric

Thanks Eric - I don’t have Facebook. That is really helpful information.

 

[Beck]

been to the dealers today but they were unable to find anything, which I appreciate is difficult because the fault wasn’t showing when they had it, hopefully just a CANBUS gremlin that won’t happen again, here’s hoping…
EricS where did you hear about a number of reports?

Thank you hopefully we can resolve issue.

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[pxh38257]

Plenty of rain at Barnard Castle when I was there last week.

Gods country

 

[PhilMary]

Gods country

Gods country for blind Government advisors, so I heard.

 

[Jonno1103]

Hi Funsters,
Found my cab battery warning light flashing this morning, then noticed headlights were on, ignition was off, dash in darkness. Turned then off, only to be told they had come back on again, engine started ok and now at Chatsworth for 2 nights. The lights keep turning back on, went to set the non-starter but got error telling me it won’t block as the Ignition is ON. Strange when the key is in my pocket. Called Vanbitz and MetaTrak and now booked in with dealer, I have disconnected the battery negative to stop the battery draining. Any ideas anyone? Battery is current showing 12.43V Ford transit Mk8 2022

It's water in the BCM. Ford will replace it under the terms of the 3 year warranty plus there's also a recall for the auto relock time span.
Don't bother booking it in with the dealer, it needs to go to a Transit Centre and you'll be quicker sorting that yourself.
No dealer is equipped to touch an early 8th Gen', 2019 Facelift or 2021 MK 8.5 base vehicle.