power consumption, windows are still powered

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swital
480 Newbie
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Joined: Wed Jan 18, 2012 3:17 pm
Location: Płock, Poland
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power consumption, windows are still powered

Post by swital » Tue Apr 19, 2016 5:14 pm

Hello
I have a problem with power consumption in my S '94. Current consumption is at ~200mA. I discovered that the windows are always powered and I can lift it without key ignition. I found that the relay number 3 in CEM is activated after the ignition is switched on , but does not turn off after the ignition is switched off and windows are still powered.
I swapped another CEM and I disconnected harness the doors and window buttons but the problem is still.
480S B20F 94' Paris Blue Metallic
480 Collection 158/480 B20F 95' Drak Green Metallic
480 Turbo 92' 234 White
744 USA Turbo, 245 USA D24TIC++, 854 T-5R, 245 Hearse, V70II D5 Polestar, C70 I Cabrio, 440 88' B20F, V70I 2.5T Heico

dcwalker
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Joined: Sun Sep 16, 2012 12:30 pm
Location: York

Re: power consumption, windows are still powered

Post by dcwalker » Tue Apr 19, 2016 7:18 pm

I might not be understanding your problem properly - you say windows are "always powered".

After you switch off the engine and remove the key, they do stay powered for a certain period of time or until a door is opened - are you sure that is not what you are finding with the windows?

Sorry if I have the wrong idea!

David
Current: 1994 480 GT, 1995 480 Celebration 467/480 (plus 2004 C70 Collection, 2014 V60 SE Lux Nav)
Previous: Celebration 346 (sold to Alan480), Celebration 269 (scrapped abandoned project), Celebration 73, 1992 ES, 1988 ES - and numerous other non-480 Volvos!

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swital
480 Newbie
Posts: 19
Joined: Wed Jan 18, 2012 3:17 pm
Location: Płock, Poland
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Re: power consumption, windows are still powered

Post by swital » Wed Apr 20, 2016 9:22 am

I switch off the engine and remove the key next close and lock the doors but windows are still powered. After night at the morning when I want to go windows are still powered without switch ignition on and the battery is completely discharge.
480S B20F 94' Paris Blue Metallic
480 Collection 158/480 B20F 95' Drak Green Metallic
480 Turbo 92' 234 White
744 USA Turbo, 245 USA D24TIC++, 854 T-5R, 245 Hearse, V70II D5 Polestar, C70 I Cabrio, 440 88' B20F, V70I 2.5T Heico

Robou
Knows an Aerodeck isn't a 480
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Re: power consumption, windows are still powered

Post by Robou » Wed Apr 20, 2016 2:50 pm

Regardless the ignition switch position, power should not be present on the console switches. It is triggered by the switches themselves on A8 and A10 of the CEM or by the door lock switches which connects ground to the connectors A18 (drivers door) and A37 (pass. door) of the CEM when you close the windows from outside.
So may be one of the console switches is malfunctioning or a door lock switch connection is permanently grounded. The latter will cause a current through both the motors and therefore is less likely. The symptom indeed will be a relay constantly being activated in the CEM, but this can not be responsible for all of the 200 mA, which, by the way, should not drain a healthy battery overnight.
As your car is from '94 I presume we are talking CEMIII.
Too old to bother
480 Turbo midst '91

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