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Large MPVs -- Ford Galaxy / VW Sharan / SEAT Alhambra: => Mk3 Ford Galaxy / Ford S-Max => Topic started by: wazza_1980 on July 22, 2017, 02:36:53 PM

Title: Electric Windows Fault & Power Drain?
Post by: wazza_1980 on July 22, 2017, 02:36:53 PM
Hello and hope someone can help?

At present my car battery drains at .60 amps when I insert the fuse for the rear passenger side window (FA3) however when this is removed the drain drops to about .25 amps, to add to this the drain drops even more if I remove fuse F21 which according to the car manual is for the Radio Unit and Rain Sensor however the Haynes manual states Control Unit and remote receiver.

When I insert fuse FA3 for the rear window the passenger side windows do not go up and down smoothly, sometimes you will push up and the window will go down instead but majority of the time they go up and down around 1" at a time this is the case for both of the passenger side windows however when fuse FA3 is removed the front passenger window then goes up and down as normal, If I insert fuse FA3 and remove FA1 for the front Passenger window the rear window then operates normally.

If I measure the parasitic drain across FA3 the drain is only showing around .03 amps so to say the least I am a bit confused.

Looking at the Haynes wiring diagrams I cannot see anything linking the two door modules together to cause the conflict, The only things I can think where the fault might be is with the central locking as I believe these work via the door modules also and the remote is able to operate the windows so this could be providing the linkage and causing the fault?

Before I start investigating further has anyone ever experienced anything like this or able to assist with a diagnosis or an idea of things to check.

Thanks in advance for your help.

Title: Re: Electric Windows Fault & Power Drain?
Post by: johnnyroper on July 22, 2017, 05:06:58 PM
Sorry not much help as I am not familiar with the mark 3 but could the body control module be a suspect as pretty much all internal electrics go through that?
Are you having issues with battery going flat? As 60 milliamperes does not seem too drastic.
Have you had battery drop tested to make sure it is ok?
Title: Re: Electric Windows Fault & Power Drain?
Post by: johnnyroper on July 22, 2017, 05:38:48 PM
Also have you tried resetting windows by closing then holding button in closed position 3 or 4 times in 1 second bursts?
Title: Re: Electric Windows Fault & Power Drain?
Post by: gregers on July 22, 2017, 05:52:03 PM
have you tried resetting the complete system?
disconnect battery,MAKE sure you have any codes etc.
leave it for a few hours iirc the alarm module is under the passenger wheel arch area?apparently this has some kind of internal battery,hence a few hours to let it completely drain down.
Title: Re: Electric Windows Fault & Power Drain?
Post by: johnnyroper on July 22, 2017, 06:50:30 PM
If it's similar to s max they can suffer water damage to the alarm that plays havoc with electrics.
Title: Re: Electric Windows Fault & Power Drain?
Post by: wazza_1980 on July 23, 2017, 09:39:44 AM
Hi All Thanks for your responses.

Yep I have tried a complete reset and this did not work,

I did not think that .60 amp was too much of a drain either but if I am doing the maths correctly this means an 80 amp hour battery will drain in just over 5 days. 

I am having issues with the battery going flat I am having to recharge it usually every 3 days, I have had the battery tested by the AA and it tested ok, they run the test a few times for me.

I have also tried resetting the windows as per your comments and this did not work either.

I also believe the wiring of the Galaxy is the same as the S-Max so the alarm could be the fault as per your suggestion, is there any way I can test this theory?

Also does anyone know what the internal HW is as the central locking links to this but not sure what it is?
Any other suggestions would also be appreciated?
Title: Re: Electric Windows Fault & Power Drain?
Post by: johnnyroper on July 23, 2017, 10:40:27 AM
Don't know what internal hw is?

Access the alarm sounder module in wheel arch and check for signs of water damage on connections,test the drain with it disconnected and operation of windows etc.

Have you had a diagnostic test done on all the modules see if that throws up any clues?
Title: Re: Electric Windows Fault & Power Drain?
Post by: gregers on July 23, 2017, 09:18:32 PM
you should be able to do a basic on board diagnostic check through the info panel.
instructions iirc in the sticys on mk3 and smax.
Title: Re: Electric Windows Fault & Power Drain?
Post by: mike wilson on July 24, 2017, 10:24:02 AM
60mA might be OK.  0.6A is 600mA.  Not OK.  That's quite a drain and suggests to me that you have something sticking on somewhere.

Five days to drain will be to complete flatness.  Modern vehicles, with a lot of digital systems, will refuse to work long before that.
Title: Re: Electric Windows Fault & Power Drain?
Post by: wazza_1980 on July 24, 2017, 09:30:48 PM
Hi all,

Thank you for your suggestions I will investigate further hopefully later this week, will keep you updated on my progress.

Quick question which wheel arch is the alarm under passenger or drivers side?
Title: Re: Electric Windows Fault & Power Drain?
Post by: gregers on July 24, 2017, 10:46:00 PM
passenger i do believe
Title: Re: Electric Windows Fault & Power Drain?
Post by: johnnyroper on July 25, 2017, 12:28:37 AM
Yes as above N/S/F
Title: Re: Electric Windows Fault & Power Drain?
Post by: wazza_1980 on July 28, 2017, 06:13:25 PM
Hi All,

Just to let you know finally checked car with alarm sounder unplugged and no change.....

Basic diagnostic as above shows 3 faults

DTC 01 F00616
DTC 02 C19900
DTC 03 C20000

Guessing I am going to have to book it into a garage as Haynes manual wiring diagram is useless :-(

Title: Re: Electric Windows Fault & Power Drain?
Post by: johnnyroper on July 28, 2017, 07:24:55 PM
The F code is low battery voltage detected

The C codes are to do with drivers door module (19900) other code passenger door module.

Now whether it's the modules at fault dragging battery down as you also have issues with the windows I do not know but it sort of gives an idea of where problem may lie?
Title: Re: Electric Windows Fault & Power Drain?
Post by: wazza_1980 on July 28, 2017, 07:39:28 PM
Thanks for confirming what the codes meant :-)

Is it worth me swapping the drivers side modules with the passenger side and seeing if the problem swaps sides? I am guessing they are universal for all doors?
Title: Re: Electric Windows Fault & Power Drain?
Post by: johnnyroper on July 29, 2017, 08:26:15 AM
If they are interchangeable it's worth trying,also worth seeing if your currant draw drops if you disconnect the module?