Weird electrical issue, GM, wipers, no start

[Sleeple55]

I've had this issue previously and discussed it in this thread https://www.bimmerforums.com/forum/s...roblems-solved. However sometime passed, the car didn't show any issues for a while. However randomly some electronics don't work even when the car is running. Just tonight I got the car out for a drive and I noticed the windshield wipers only work on highest setting. Shutting the car off revealed that the car will not crank, windows are dead, and locks are all shut. It has a new fusible link, jumping it doesn't solve the issue. Disconnecting and reconnecting the battery seems to temporarily solve the issue. I have no clue what to say about this. Can someone please help.

[shogun]

Did you already check all the modules and relays and fuses under rear seat driver side? Any water/moisture there? Lift the carpet there and check all the splices.
Also check the ground cable from engine to chassis, on my car on the right side in engine bay near the right engine mount. Bad ground can also cause a lot of problems.

Windows, locks, wiper is all controlled by the central chassis electronics = GM, general module, Based on the 1995 ETM your car has 2 fusible links
See page 0670.2-01 http://shark.armchair.mb.ca/~dave/BMW/e34/e34_95.pdf
from battery:
F0 red cable, 80A, details see page 0670.2-07 , goes to rear seat driver side fuse box
F97 red cable, goes to engine bay, B+ junction point = DME etc box right side engine bay/B+ point, see drawing 1 and 2 page 7100.01, and from there to the front power distribution box

One more thing to check, we have had probs on E32 with the battery minus connection. Not at the battery, but at the other end, check if the other end it bolted tightly, here you see where to check, in front of the rear passenger seat.
https://bmweba.com/eba-01-29-9-783-039/
There is mentioned BMW 530i, 535i, 524td, hope the same is on your car.
Remove cover (1) from the rear seat base on the right.
Remove hex bolt (2) and take off cover (3).

[shogun]

no start situation E34, E32, E36, E30

From 1991 BMW used a 88 pin DME which was used on 4,6,8 and 12 cylinder engines. Locations
late E30 below steering column
E36 left hand fire wall/plenum
E34 right hand rear corner engine bay
E32 right hand rear corner engine bay

If you have a no start situation, check for ignition, injection and fuel pump operation. If none of the above operate then the supplies and earth's as well as the crankshaft trigger inputs need to be tested. Because the E36 has the DME mounted inside the plenum chamber behind the firewall, it is common for it to become water damaged when the plenum chamber drain pipes get blocked and water enters the DME. It is recommended to check these drain pipes when replacing a DME.
The DME in an E36 can be accessed by removing the plate on the firewall behind the left hand shock tower.

Power feed circuit
pin 26 - constant 12v feed from the battery
pin 54 - power in from DME main relay
pin 56 - ignition key power, only has power when key on

When the ignition key is turned on, power is supplied to pin 56. The DME will then supply an earth at pin 27 for the DME main relay to pull in. When this relay pulls in, power is then supplied to pin 54 via the contacts of the relay.
When the engine is running and the key is turned off, injection and fuel pump stop immediately. After the engine has finally stopped rotating the DME will then stop supplying an earth for the main relay on pin 27. Therefore the relay will open and stop supplying power to pin 54.

courtesy of http://www.injectronics.com.au/asset...Bulletin45.pdf

They have some more good tech info like BMW Bosch Motronic DME pinout http://www.injectronics.com.au/assets/Uploads/T0066.pdf

E34/E32 dash cluster language display change http://www.injectronics.com.au/assets/Uploads/T0043.pdf

http://www.injectronics.com.au/techn...ssistance/bmw/

[Sleeple55]

Sorry for being unresponsive, I have many things going on right now. I don't think this is an issue with one computer/module. I examined wiring diagrams for my car, all systems which fail have at least one fuse in the front power distribution box. I should re-check the fusible link providing power to the front power distribution box, maybe I will temporarily bypass it and see if the issue comes back.

[boy2nd]

sorry if i join this thread lol, i got electrical issues too in my power windows, before it happen my power windows is working well , all 4 door auto up and down is OK, until in the back i hear a relay rapidly clicking. i got this error via DIS v44 it say , power windows grounding wire
WhatsApp Image 2019-02-19 at 17.37.53.jpeg

[shogun]

And what is the question? The fault messages says it all what you have to do.
Ground wire for power windows. Repair ground wire to relay module, connector A (white) pin 20. Note: the fuse relay is switched off when this fault is present.

https://download.bmwland.ru/valera/E...ow_ETM/6100.0/
A=X253 26-pin, green = GM
B=X254 26-pin, white = GM
C=X255 26-pin, yellow = GM
D=X332 5-pin, white = GM
E=X258 20-pin, black = RM
F=X259 20-pin, white = RM

GM = general module = ZKE
RM = relay module
Both are under rear seat left hand side

in German http://www.e32-schrauber.de/bmw/s-sicherungen.htm

[Sleeple55]

I found out information about my electrical issue. My symptoms correlate with symptoms of a faulty general module. Possibly disconnecting the battery allowed the module to reboot completely making it functional again. I found out that if the module is faulty the car will not crank and if the module is the issue, correctly removing it will allow the engine to crank and start. I found this at https://www.bimmerfest.com/forums/sh...d.php?t=757500

I can't say for sure if this helped as the issue occurs randomly, I will just wait and see if it comes back.

[shogun]

I have my doubts on this comment, till someone can explain it based on ETM: "Remember - These cars will start if the GM is removed, so if you have a no-start (no cranking from the key) condition, properly removing the GM will allow it to crank and start."

Edit: here is the detailed German language training hand book ZKE = GM/RM central chassis electronics with wiring diagram.
I had a look thru all the functions like wiper, doorlock heating, interior light, wiper pressure, washwater etc, the only thing I can imagine which stops the engine to start is the crash sensor and that is connected to the GM http://www.e32-schrauber.de/bmw/s-zke.htm
On E32 the crash sensor is hidden under the seat frame of the driver side rear seats, shown here http://bmwe32.masscom.net/johan/elec.../rearseat.html

Then on my E32 there is a hidden fuse here for DWA and OBC, with OBC one can also use a code for drive away protection, see owners manual http://www.bimmerboard.com/forums/posts/236235/ not sure if that is same on E34, maybe someone can comment

[shogun]

Here I just found a similar case, he mentions:
All fuses in the engine bay are ok. The fusible link next to the battery in the engine bay appears to have no hairline cracks. I found that my carpet on the left hand side of the car was very, very wet. Water was also beneath the left rear seat where the rear-power-distribution-box sits. This must be somehow related to my problems. I checked all fuses at this location and they are also ok.
I removed the seats and the carpet to dry them. I then followed the instructions from the thread that I found on this forum and opened the wiring loom that sits beneath the rear carpet on the left side close to the rear seat. There were many corroded connections which I soldered back together. This brought the interior lights and the radio back to life. All other systems stayed dead. I removed the relay-module and the general-module and the three relays from the rear-power-distribution-box and dried them over night with dry beads. No effect.
I then concluded that my failures must stem from a broken general module. I bought a used GM and a used RM from ebay with the correct part numbers. (GM = 61358368571 / RM = 31351379741).
Today I tried to install them which brought no change at all.
I then removed the GM out of curiousity and suddenly the engine fired right up when turning the key. Naturally, all other systems didn't work. I feel like I'm in a dead end now. Why does the engine suddenly start properly without the GM? Is it possible that the GM interferes with my anti-theft-module? (I should have the EWS II). I tried finding the EWSII but had no success. Is there maybe a way to bypass it? Does anyone have an idea which other wires I should check?

http://www.bimmernut.com/forum/showt...34-from-4-1995

Maybe some electr. experts can chime in and comment

[Sleeple55]

Its been a while since I removed my GM, The car doesn't have any issues starting. I guess this proves that the issue wasn't with the fusible links, rather it was just a faulty GM. Thanks for the help.

[golfdrum]

I have a very similar issue. My 95 e34 was flooded August 10th. about 1 or 2 inches of water got into the back floor area under the back seat driver's side. The flashers came on, all windows went down and the sunroof opened automatically. I have checked every fuse, relay, with no luck. Full charge on the battery, when I turn the key everything comes on, but the vehicle will not start. The windows will not go back up. I think the issue is in the rear power distribution box area and specifically the relay module and the general module. I have the Bentley manual but it doesn't show how to remove these. I've removed the top cover, everything is open & I cannot lift or pull either of these modules out. Any tips on how to remove? I'm thinking if I swap the relay and general module out with a replacement that has the same numbers, my issues and problems may be corrected. Does anyone else have experience with a flooded vehicle where the water did not come up very far, but enough to set off the sensor to drop the windows and turn on the flashers? What did you do to fix or correct the issue. There's nothing out on the internet referring to this issue or problem. thanks!

[JimmieG]

My E 32 is a 89 735i NA auto and I have had a intermittent battery drain got a amp clamp to test and when digging into it found fuse 44 blown and goes to the GM my door locks work window also so wondering what part of the GM fuse 44 powers up drivers doorlock heater?

- - - Updated - - -

Sorry my bad fuse 45