power window relay live at all times??
Thread Starter
Newbie
Joined: May 2009
Posts: 5
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From: NH
1989 190e 2.6 auto
power window relay live at all times??
the attached picture show two relays..the one on the left gets warm, and even with the key off, it will click when you take it out and put it back in..im assuming this isn't good. ive also noticed that my power windows will work without the key on or in (at least the front two windows..ive confirmed power to the right rear)..but when i pull this relay,the power windows will not work...also i believe this is the relay that controls the SRS light...but the funny thing is,now that ive taken the relay out a few times,the SRS light doesnt come on at all, even when starting the car.. which is fine with me lol..
so my question is this...why the heck is this relay on the left live and turned on at all times? i've swapped it with the relay on the other side, which isn't always on,and same deal...i dont think its a relay issue, i think it has to do with the fuse box...
any ideas?
matt
so my question is this...why the heck is this relay on the left live and turned on at all times? i've swapped it with the relay on the other side, which isn't always on,and same deal...i dont think its a relay issue, i think it has to do with the fuse box...
any ideas?
matt
Super Member
Joined: Feb 2005
Posts: 624
Likes: 7
From: Las Vegas
1987 190E 2.3
SRS does not have a relay, it comes straight from the control module.
Yes that is the relay for the windows. It should not have any reaction when the key is out.
Window fuses are 7 and 8.
I can't see any reason why it would be active at all times with my wiring diagram, the issue would be between the battery and fuse box.
Your blue fuse is blown.
Yes that is the relay for the windows. It should not have any reaction when the key is out.
Window fuses are 7 and 8.
I can't see any reason why it would be active at all times with my wiring diagram, the issue would be between the battery and fuse box.
Your blue fuse is blown.
Thread Starter
Newbie
Joined: May 2009
Posts: 5
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From: NH
1989 190e 2.6 auto
hmm
the blue fuse is for my AC..i may have discovered my problem though..i did some reading online last night and discovered that there is a secondary switch on the 190e near the dome light door switch that allows you to open the windows when the drivers side door is open..i believe this switch may be bad..will keep ya'll posted
Newbie
Joined: Sep 2015
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190E, 190D
W201 190D 1991 Window relay constant 0.24 Amp draw
Hi, never been here before. Perhaps you can steer me please? Relates to this topic I think.
W201 190D 1991 Window relay constant 0.24 Amp draw.
I have a battery draining at 0.24 Amps. Pulling Fuse 12 sorts that, but, pulling the Window relay also sorts the issue – except windows do not work of course. I have discovered that the window relay is constantly energised.
Looking at wring diagram, Fuse 12 is fed from Ignition switch, as are other circuits on Fuse 12, when switch is position 2.
Having tested all from Fuse 12 (Rear Dome, Antenna feed etc.), and disconnected the door switches, Window relay remains energised. My conclusions so far are that:
1. Incorrect window relay fitted – seems possible but unlikely.
2. Diode under fuse box – probably not as other circuits on Fuse 12 are live with Ignition off and key removed.
3. Factory fitted alarm – but have unplugged all alarm connections to test on alarm boxes under passenger toe board and behind radio (Becker units)
4. Ignition switch faulty – are they know to fail?
Forum assistance will be most welcome.
W201 190D 1991 Window relay constant 0.24 Amp draw.
I have a battery draining at 0.24 Amps. Pulling Fuse 12 sorts that, but, pulling the Window relay also sorts the issue – except windows do not work of course. I have discovered that the window relay is constantly energised.
Looking at wring diagram, Fuse 12 is fed from Ignition switch, as are other circuits on Fuse 12, when switch is position 2.
Having tested all from Fuse 12 (Rear Dome, Antenna feed etc.), and disconnected the door switches, Window relay remains energised. My conclusions so far are that:
1. Incorrect window relay fitted – seems possible but unlikely.
2. Diode under fuse box – probably not as other circuits on Fuse 12 are live with Ignition off and key removed.
3. Factory fitted alarm – but have unplugged all alarm connections to test on alarm boxes under passenger toe board and behind radio (Becker units)
4. Ignition switch faulty – are they know to fail?
Forum assistance will be most welcome.
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Newbie
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190e 1.8 auto petrol
power window relay live at all times??
I hope my new post to this very old post helps 190 owners as MB world and the internet in general is a massive help in keeping our 190E auto on the road.
So the way the electric windows work on our 93 is,
With the ignition key out and either the passenger door or drivers door open the door relay R2 stays energised and either front windows can still be operated from the consul switches.
With the doors closed ignition key still out R2 is de energised and the windows now cannot be operated from the consul.
This can be proved by either sitting in the car and opening/closing the doors or by pushing by hand the lower door switch near the door hinge and feeling/listening to the relay R2 clicking in/out, bonnet open and fuse box lid open.
Hope my post helps as I could not find any electrical drawing showing the wiring link between doors and the power window operation that are available on the internet.
Best regards to all
Phil
So the way the electric windows work on our 93 is,
With the ignition key out and either the passenger door or drivers door open the door relay R2 stays energised and either front windows can still be operated from the consul switches.
With the doors closed ignition key still out R2 is de energised and the windows now cannot be operated from the consul.
This can be proved by either sitting in the car and opening/closing the doors or by pushing by hand the lower door switch near the door hinge and feeling/listening to the relay R2 clicking in/out, bonnet open and fuse box lid open.
Hope my post helps as I could not find any electrical drawing showing the wiring link between doors and the power window operation that are available on the internet.
Best regards to all
Phil
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