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Thread: Problems with the starter, the electrics and the general module in an e34 from 4/1995

  1. #21
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    May 2004
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    The pictures work. First time that I see a fusible link in that location in the engine bay. But the colour the green wire is strange, normally a fusible link wire is red colour. Also the blue thick wire there seems to be not original (?). Maybe it was installed later not by BMW. Try to find out where they go from ....to
    Is the battery located under rear seat passenger side or in engine bay? Both was possible on E34.
    Last edited by shogun; 03-16-2019 at 04:59 PM.

  2. #22

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    Hi Shogun,

    My battery is in the engine bay. I also tried looking for the fusible link under the rear seat where the battery would be located but could not find anything.
    You are correct, the blue wire was installed by my dad and me. It connects two wires that were used by the workshop where the car was (without success) being diagnosed after getting towed from my house be the ADAC (German Drivers Club).
    The mechanics at the workshop used the wires to bypass the starter in order to test if it was still working.
    My dad and me connected these two wires and installed a button switch which could be used to bypass the starter on demand.
    Why did we committ such a weird act of Frankenstein-experiments, you may wonder. Well, the answer is simple: Before we found out that the car starts fine after pulling the GM, we were looking for an improvised way to get it running. And a switch is much nicer than bypassing the two wires with an additional wire. I'm 100% sure that this little "feature" is not messing with the car. All problems were there before and nothing changed after we did install the switch.

    Anyway, my hope is on the two new GMs that I ordered from ebay. I also thought about replacing the K15 relay which controlls the power given to the GM and RM. I read this on this website: http://www.ah525i24ve34.at/HTML_ah52...ktrik_zke.html

    Thank you and have a nice sunday.

    As usual, best regarsd from Germany.

  3. #23
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    o.k., battery in engine bay, that is important for us. As a general rule we can say the fusible link is always close to the battery. Looks like it is a 50A fusible link.
    Here - that is again a US 525 - they show that that fusible link is 80A http://www.bmwe34.net/E34main/Mainte...sible_link.htm
    the failure syndromes they mention there = Failure syndromes: Intermittent simultaneous failure of wipers, sunroof, windows, central locking, radio, No power, like if the battery was dead = that is mainlyl GM related = Zentrale Karrosserie Elektronik.
    It may be that your 518 has only one fusible link.

    still searching in the net for a matching Stromlaufplan / wiring diagram, the German E34 forum has these https://www.e34.de/tips_tricks/schal...haltplaene.htm

    here we come closer, 1994 518i is listed there, wayback machine helps https://web.archive.org/web/20070416...w_e34/E34.html
    check it, not all pages work there.
    German language Werkstandhandbuch Schaltplaene E34, also includes 518 https://www.ebay.at/sch/sis.html?_it...k&_mPrRngCbx=1
    maybe the cheap CD will do instead of the books. Or here in Augsburg per book 50 EUR https://www.ebay-kleinanzeigen.de/s-...37140-241-7525
    Original BMW Ordner
    Modelljahr 1988 525i,530i,535i, 1988 520i,524td, 1989 525i,530i,535i,M5, 1989 518,520i,524td, 1991 518,520i,524td, 1991 525i,535i,M5 2 Ordner, 1992 518i,520i,525tds 2 Ordner, 1992 525i,535i,M5 2 Ordner, 1993 518i,520i,525tds 2 Ordner, 1993 525i,M5 2 Ordner, 1994 518i,520i,525td/tds 2 Ordner, 1994 525i,M5 2 Ordner, 1995 518i,520i,525td/tds 2 Ordner, 1995 525i,M5 2 Ordner, 1996 525i,M5 2 Ordner, Preis pro Ordner, Versand gegen Portogebühr

  4. #24

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    Hi guys,

    my car broke down on my way to work tonight. Here's what happened. I was driving around 50km/h when I noticed that my gas pedal was very sluggish (Schwergängig, not sure of correct translation).
    So I pressed it down with a bit more force. It suddenly gave in and my engine fired up to 6000rpm even when I let my foot of the pedal.
    Panic-stricken I came to a halt and turned off the engine.
    I then removed the cover of the bowden-cable over the intake and tried to examine it.The bowden cable was very loose and flaccid. Since the cable is held in place inside some kind of plastic-screw, I tried screwing it back in a little, so it would be tightened again.
    I started the engine again but it immediatly fired up to max rpm again, so I quickly turned it off. The cable is NOT broken, however. I can press down the pedal and the throttle valve moves.
    I then called the Auto-Club and got the car towed to the a workshop nearby.
    I read a bit on the internet and learned that this could be caused by a broken or dirty throttle valve. I'll go to the workshop tomorrow morning, right after completing my nightshift at work. Does anyone have an idea what might have caused this?
    Hell, this was scary, especially since the engine was completely cold. I hope that the 5 seconds of max rpm didn't damage anything.

    As usual: Best regards from Germany.

  5. #25
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    I assume nothing happened to the engine, there is a RPM limiter as a safety, cuts off the fuel.
    Looks like your bowden cable is stuck. Here is the part number, recheck the p/n with your VIN http://de.bmwfans.info/parts-catalog..._bowden_cable/
    Gaskabelzug 35411162171 abt. 15 EURO.
    There are BMW Throttle safety clips, scroll down here http://www.nmia.com/~dgnrg/for_sale.htm p/n 35401165393 Prevents throttle cables from detaching, which can cause dangerous unintended acceleration
    make one DIY http://i106.photobucket.com/albums/m...L/DSC00075.jpg

    The plastic screw is basically the problem, here a cheap fix , Throttle Bushing repair for $1.72 https://www.bimmerforums.com/forum/s...epair-for-1-72

  6. #26

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    Hi guys,

    the high-rev-issue was fixed easily. It was just a dirty throttle valve that got stuck. After spraying it with brake cleaner, everything is now fine again.
    Today I installed two more GMs. Unfortunately it brought no change at all.
    I'm gonna focus now on finding that damned 50a fusible link.
    I will also revisit the wiring loom under that carpet on the left side of the car. I'm sure the culprit must sit there.
    I'll keep you updated about any results.

    As usual, best regards from Germany!

  7. #27
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    Dec 2003
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    Quote Originally Posted by German518iowner View Post
    the high-rev-issue was fixed easily. It was just a dirty throttle valve that got stuck. After spraying it with brake cleaner, everything is now fine again.
    The throttle body could be worn causing the issue as well. Definitely do a good inspection on it!
    95 E34 530I V2.31
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  8. #28

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    Hi guys,

    I did it! The BMW is running great again!
    The culprit was a 50a fusible link under the rear seat in a small black box. It appears as I have one rare BMW that has two black boxes for the fusible links and no fuses under heatshrink.

    Thank you to everyon who helped me.

    Until then,

    Best regards from Germany!

  9. #29
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    Quote Originally Posted by German518iowner View Post
    Hi guys,

    I did it! The BMW is running great again!
    The culprit was a 50a fusible link under the rear seat in a small black box. It appears as I have one rare BMW that has two black boxes for the fusible links and no fuses under heatshrink.

    Thank you to everyone who helped me.

    Until then,

    Best regards from Germany!
    That's really great news. Well done for sticking in there FTW! These problems can be so frustrating, but now you can enjoy your new life with the old-school e34

    So 518i has its body electronics 50A link under the rear seat, before it feeds the main body distribution box back there? Interesting, but in a black box you say? Or is it a cover that opens to allow you to change the fuse? Where? Near the power distribution box LHS, or the open area where the battery normally is on 6 and 8 cylinder models?

    The 80A one under your windshield had us wondering, it looked factory to me and for a car with the battery under the hood, that'd have been good enough for the 'loom' wizards in the 90s. These days the looms are all made by robot, not hand-bound with PVC and fabric tape like BMW had been doing since WWII until it introduced the e39 which was designed with Computer Area Networking (CAN).

    Again, great work, and thanks for keeping us up to date on your troubles!

    Join the Aussie
    540i LE yahoo forum

    08/88 535i e34 M30+miller MAF, 'stiens, tints & teeth!

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