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7 Series - E38 (1995 - 2001)

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  #1  
Old 08-29-2011, 04:11 PM
Aria Aria is offline
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Mein Auto: 1998 740iL
'98 740i, continuing with the stupid wipers

Wipers haven't been working. At all. We replaced the relays and noted no corrosion. Everything looked great. Husband just installed a new motor. As in just finished about 10 minutes ago. Still nada. We have a Bentley manual which doesn't give much in the way of troubleshooting anything with the wiper system other than the wipers themselves.

We are at a loss, and still on a suffocatingly tight budget (to say the least, unfortunately). Any ideas?

And since we are now getting some wet stuff from the sky...it's rather urgent.

Last edited by Aria; 08-29-2011 at 04:12 PM.
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  #2  
Old 08-29-2011, 05:06 PM
Aria Aria is offline
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Also as far as the switch, it DOES turn on the jets. But the wiper motor, even the new one, does nothing. No sound at all.
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  #3  
Old 08-30-2011, 05:24 PM
exred92 exred92 is offline
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Your General module could be bad. If you have a friend with same car try to swap it out, location of the GM under glove box very easy to get to.
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  #4  
Old 08-30-2011, 05:28 PM
Aria Aria is offline
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That's a different one than the two under the computer panels? I was up under the glove box a couple days ago and noticed a green relay up there that is on the cabin side that couldn't be reached from the outside, and that the ones I changed couldn't be reached from inside. Is it the green one, or was there another I overlooked? I have a sleeping toddler on me right now, so I an't get outside and check.
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  #5  
Old 08-30-2011, 05:30 PM
Aria Aria is offline
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This one?

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  #6  
Old 08-30-2011, 05:34 PM
exred92 exred92 is offline
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NO it's a bog white module with 3 connectors I think 2 whites and 1 black.

http://www.realoem.com/bmw/showparts...20&hg=61&fg=25

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  #7  
Old 08-30-2011, 05:36 PM
exred92 exred92 is offline
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If you not sure what it looks like google images BMW GM E38
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  #8  
Old 08-30-2011, 05:40 PM
Aria Aria is offline
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Oh holy crap, we absolutely do not have that much money. ****!
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  #9  
Old 08-30-2011, 05:42 PM
exred92 exred92 is offline
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ebay
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  #10  
Old 08-30-2011, 05:44 PM
exred92 exred92 is offline
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Plus before you buy it, you need to make sure is that what you need!!! If you can swap it out.
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  #11  
Old 08-30-2011, 06:36 PM
Aria Aria is offline
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We don't know anyone local with a BMW.

Question - would the GM also be responsible for things like the AC?

I'm looking on eBay right now, actually.
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  #12  
Old 08-30-2011, 06:44 PM
exred92 exred92 is offline
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Listen I'm NOT saying that is your problem, it could be...
What is your A/C problem??
Also one thing you need to remember is IF GM is your problem you need to code it to your vehicle which is done at the dealership.
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  #13  
Old 08-30-2011, 07:17 PM
Aria Aria is offline
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I understand you're not saying that it is definitely the problem. Through process of elimination, it could be though. We've replaced the motor, the relays, checked the wires, the fuses, the switch, etc.. What's left?

The AC turns on intermittently.
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  #14  
Old 08-30-2011, 07:25 PM
exred92 exred92 is offline
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I don't think GM is responsible for your A/C problem, sorry buddy. It more sound like an electrical issue shorted wire..... or could be something else.
Good Luck!
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  #15  
Old 08-30-2011, 07:45 PM
Aria Aria is offline
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LOL, everyone thinks I'm a dude!

Yeah, I called a local dealership earlier and the guy I spoke with said, "It could be the general relay or module, same thing." Way to confuse an exhausted and stressed me! That's what I get for parroting instead of digging out the Bentley to see if he was right. (I have no idea where my husband stuck it.) Thanks for putting up with my brainlessness on that.

Anyway the more I'm reading about it, the more it sounds like something on he general module isn't right. The center console button for the door locks doesn't work well, for one. For another, the key fob doesn't reliably open the rear door locks. So I think we'll try this next. Trying to decide now between buying on on ebay and taking it to a dealer and pay out the nose for an hour of time to have it programmed, or to pull ours out and send it to a mechanic in southern California to repair and program if needed. Do you know anything about this guy? http://www.bmwgm5.com/
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  #16  
Old 08-30-2011, 08:02 PM
exred92 exred92 is offline
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Sorry about that -"dude" remark

The central locking problem is also GM responsibility!!!
About the guy in Cal did not hear anything about so can't say
But look it this way if you buy it from ebay it still needs to be coded to your car and if you send it to Cal he might fix it for you and coded and you'll all set, but again never heard of that guy before, so ..... I don't know for how much you find it on ebay, but to coded it to your car at the dealer would cost you 1 hour of the dealers rate, so you can compare prices and decide what is best way.
Good Luck.
P.S. Just in case if you decided to go with ebay make sure that your husband will install GM MODULE himself otherwise dealer is going to charge for coding and installation.
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  #17  
Old 08-30-2011, 08:22 PM
Aria Aria is offline
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No worries about "dude." I know that not many ladies work on cars. My late-dad was a mechanic, so I grew up working on, well, Harleys more than cars, but still.

There are two dealerships near here, and I know one charges $120 an hour. I'll actually be the one to take care or removing and reinstalling the module. I have him do the stuff that requires more muscle since I've become such a weakling somehow.

It's just deciding which direction to go at this point. And hoping really hard it works. We really don't want to have to park the car for this whole winter and have to take a toddler to wait at transit stops to get around.

Still, I love BMWs, this is my second one and I've got a goal to hit half a million miles (160k left to go!), and I'd like to get another BMW when this one finally kicks the bucket!
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  #18  
Old 08-30-2011, 08:43 PM
exred92 exred92 is offline
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Wow 340k that's a lot, just turned 100k on mine today!!!!!!!!!!
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  #19  
Old 08-30-2011, 10:08 PM
Aria Aria is offline
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Yup, I've always been one to drive a lot. I drove my E34 to 277k before totaling it. It overheated and I just had to hobble it home, warping the freakin' head.... This one's going to make it to half a million.

That guy I linked to insists that the GM3 for this car is "solid as a rock," but yet I've read so much about problems with this module. Doubt is something I can't afford right now because we can't afford to try this after that after this right now.
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  #20  
Old 08-31-2011, 04:25 AM
Brummel Brummel is offline
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Aria.
Before blaming the GM, take a look at the wires underneath the wiper relays, corrosion seem to be a common problem with our e38s.
http://www.bimmerfest.com/forums/sho...d.php?t=230716
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  #21  
Old 08-31-2011, 06:58 AM
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joyism5 joyism5 is offline
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Hi Aria,
I feel really sorry for you knowing that you still struggle with the wiper system. Looking again over the issues, like Brummel stated it could be the General Module faulty, since he is controlling the wiper system as well as many other functions (door locks, windows, sunroof).
One way to rule out this GM ( you can't swap it, since it has to be coded with your VIN #) is to remove it , and excite with a fused wire one of the wires that goes in the 20 pin jack. Take a look at the complete diagram provided in previous thread , post # 8 http://www.bimmerfest.com/forums/sho...405&highlight=.
Follow the wire from the motor to the switch , and you will see that goes through the GM. From the GM goes the signal according with the wiper speed desired via certain Wires. Exciting any of this should turn the wipers ON. Is just like you jump the GM.
General module is known to have software issues like battery drainage,lights not working, etc. All this are functions of the GM as well as the wiper system . Post # 11 here (General Module replacement http://www.bimmerfest.com/forums/sho...967&highlight= says that most of the times Modules have been returned with no fault except with a software issue. Knowing this you can have a good module which needs to be re coded (reprogrammed) . I am not sure about this but : If you ask the dealership to re program your Module they will not be able to do it if that's faulty. So instead of asking for a diagnosis which can take several hours, ask to reprogram the GM. If there are issues with it , it should pop out on their software.

In the end you can :
-swap it with another one will not work since it has to be re coded with your VIN#
-Jumping the wires from that 20 pin connector could pin point the issue. Honestly I never did it, but if that was my car I'm sure I'll do it before spending the money at the dealership.
-you can take it at the dealership and see if a reprogramming will solve the problem. Again, if it was my car I will reprogram it before sending it to repair.
Last thread in here is describes how to remove the GM.
As more as I look over, it appears that your issue is coming from GM or related wires.
Please keep us posted with your findings, I'm very curious how it will get solved. If you have any ? don't hesitate to PM me.
Good Luck !
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Last edited by joyism5; 08-31-2011 at 07:03 AM.
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  #22  
Old 08-31-2011, 01:14 PM
crazyb0064 crazyb0064 is offline
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ac issue might be a fsu going out, it can cause your fan to work on and off, not work at all, drian your battery from going all night. worth looking in to
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  #23  
Old 09-07-2011, 12:43 PM
Aria Aria is offline
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Thanks so much! We will try what you said. Going to get the fused wire now.
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