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-   -   97 BMW 740il Alarm key wont open trunk & rear windows wont go down (http://www.bimmerfest.com/forums/showthread.php?t=656120)

maxo898 11-04-2012 06:20 PM

97 BMW 740il Alarm key wont open trunk & rear windows wont go down
 
Hi I have a 1997 BMW 740IL that was fine until i came to unlock all the doors by pressing the unlock botton on my key twice and the sieren only sounded once unlocking only the driver and passenger side doors. It doesn't unlock the rear doors and both windows wont go down. Also you can't open the trunk from the key by pressing the the botton or the button inside the car. The only way to open the trunk is manually with the key.:( I checked all the fuses in the trunk and they are all good. I change the actuators for the the rear doors with good working actuators and still same problem.

setconstr 11-04-2012 10:30 PM

re
 
You should try reprograming your key

Raji 10-25-2013 08:14 PM

Rear doors, windows and trunk won't open from key fob
 
Just wanted to know if you found any solutions for this problem. I got exactly same issue.
Thanks in advance.
Raji

maxo898 10-25-2013 08:39 PM

I found out that it was a 30 amp blown fuse under the hood. Replaced it everything works now.

Raji 10-25-2013 08:56 PM

Thanks
 
Do you happen to remember what number fuse it was, I will check the fuses again .
Greatly appreciate your quick reply.
Thanks a bunch.

maxo898 10-25-2013 09:00 PM

Sorry I don't but there isn't a lot of green 30 amp fuses under the hood. Good Luck

Raji 10-25-2013 09:13 PM

97 BMW 740il Alarm key wont open trunk & rear windows wont go down
 
Thanks.


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Mayorchuck 10-25-2013 09:34 PM

Just an FYI. The front doors work off the door modules while the back doors, fuel door and trunk work from the General Module. Re-iniIalizing your key often solves this issue.

Raji 10-26-2013 01:03 PM

Thank you all .
Maxo898 you were right, it was one of the Green 30 Amp fuse under the hood. I replaced it and it works perfect again. Greatly appreciated.

Mayorchuck 10-26-2013 07:39 PM

Good to hear. Was is one of the 30A fuses in the fuse carrier that holds 5 fuses? Would be good to know for future reference.

Raji 10-26-2013 08:14 PM

Under the hood when you open the fuse box located in right upper corner. The 30 amp Green fuse was in 2nd row from left to right, I believe it is labeled as fuse 29, it was next up to the red fuse from bottom up in second row.
I have picture, but don't know how to post for reference.
Great support guys. Thanks.

Mayorchuck 10-26-2013 08:21 PM

Makes sense. It is one of the ones that covers the General Module. I would think it would also cause other issues handled by the GM but they may be things not used often. Thanks for the info.

QSilver7 10-26-2013 08:24 PM

WOW! Almost a year and we've almost got a resolution to this issue (for those that may find it doing a search in the future) :rolleyes:

Since this is a central locking issue...I would assume that the 30amp fuse in question would be one of the ones for the central locking system that would be in the engine bay location. Since we know that the fuel filler flap/door fuse is in the trunk (fuse #53)...then I would assume to look at the fuse index listed on the fuse cover in the engine bay for "central locking system".

And that appears to be fuse #8, #29, & #31...but guess what y'all...all THREE of those fuses are 30 amp fuses. :dunno: So how about some give-back to the forum and report back which fuse it was that was replaced. We might find out from the two forum members that solved their issue if the fuse # was the same. And if it is, then we will know in the future, that this issue may be resolved by replacing a specific fuse ... just like we do when the fuel filler flap doesn't lock with the central locking system and the remote key doesn't function nor can it be initialized.

This forum functions at its best when forum members post back with resolutions of what works or what doesn't work. Its the collective wisdom, knowledge, & experiences that makes this a great place. If we fail to keep adding to the collective wisdom, knowledge, & experiences...then we might as well fold up shop. :angel:

Raji 10-27-2013 10:08 AM

It was Green 30 amp fuse located in bottom half of middle row in above fuse box picture, the Green one ABOVE the Red fuse. It immediately resolved my both rear doors, both rear windows as well as the trunk. All of them works perfect after I replaced the fuse. Hope this helps.

QSilver7 10-28-2013 01:32 PM

Quote:

Originally Posted by Raji (Post 7921242)
It was Green 30 amp fuse located in bottom half of middle row in above fuse box picture, the Green one ABOVE the Red fuse. It immediately resolved my both rear doors, both rear windows as well as the trunk. All of them works perfect after I replaced the fuse. Hope this helps.

I believe that is fuse #29. I don't have my e38 handy (drove the x5 today)...but I believe there are approx 16 fuses in each row...so that would make the fuse you mentioned fuse #29. :thumbup: :thumbup:

lucky 7 01-04-2014 09:17 PM

I just wanna say im new to this forum and I LOVE IT .. I was having the same problem with my 97 740iL and now in 5he morning I will go and check my fuses thanks a lot !!
1 question how much would it cost to replace my key its pretty old and worn

lucky 7 01-05-2014 11:17 AM

it worked !!

QSilver7 01-05-2014 10:59 PM

Quote:

Originally Posted by lucky 7 (Post 8055483)
1 question how much would it cost to replace my key its pretty old and worn

To replace a remote key usually runs between $150-$300...depending on how much your local BMW dealer charges for one. If all you need is a spare key (for emergencies etc)...then you can order one of the other non-remote keys and they usually run between $45-$100. I would recommend the:
  • illuminated key
  • spare key w/metal blade
  • spare/wallet key w/plastic blade


There's also a valet/service key...but I don't recommend it for a back-up since it can't open the trunk...and that's the #1 place an owner is likely to lock the key inside the vehicle.

If all you need is to refresh your key...the old style key can easily be revived by replacing the rubber key pads (usually for approx $5 on ebay). I've done my 97 e38's remote key & my 99 e39's remote key...see the pics below...and again, you can search google for "BMW rubber key pads" or search eBay:


lucky 7 01-06-2014 05:02 AM

Quote:

Originally Posted by QSilver7 (Post 8057696)
To replace a remote key usually runs between $150-$300...depending on how much your local BMW dealer charges for one. If all you need is a spare key (for emergencies etc)...then you can order one of the other non-remote keys and they usually run between $45-$100. I would recommend the:
  • illuminated key
  • spare key w/metal blade
  • spare/wallet key w/plastic blade


There's also a valet/service key...but I don't recommend it for a back-up since it can't open the trunk...and that's the #1 place an owner is likely to lock the key inside the vehicle.

If all you need is to refresh your key...the old style key can easily be revived by replacing the rubber key pads (usually for approx $5 on ebay). I've done my 97 e38's remote key & my 99 e39's remote key...see the pics below...and again, you can search google for "BMW rubber key pads" or search eBay:



Yea my key jist needed to be refreshed so I ended up ordering the buttons off ebay thanks a lot man
That actually saved me a lot of money

QSilver7 01-09-2014 09:54 AM

Quote:

Originally Posted by lucky 7 (Post 8057872)
Yea my key jist needed to be refreshed so I ended up ordering the buttons off ebay thanks a lot man
That actually saved me a lot of money

Great...it's nice to be able to give new life to our old keys...for very little money. :thumbup: :) :thumbup:


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