Alex1978 Posted August 14 Share Posted August 14 Greetings, everyone, Fundamental inquiry. An picture of the fuse box for my BMW 318 D ES Z3SF 4DR E90 SALOON M47 2.0 is attached. This vehicle is configured for right-hand drive. The fuse box is located on the left side. The battery is located in the trunk on the right side. The battery displays a voltage of 12.5 volts and is completely charged. A broad red wire is connected to or from the battery. Uncertain if the issue originates from the alternator or whether it is supplying electricity to the dashboard and fuse box from the battery. I believe it originates from the alternator due to its need to provide a substantial current. The dashboard is nonfunctional; there is no electricity emanating from the back battery. Nothing is effective. I originally suspected a fuse, but that would only disable one instrument; thus, it must be a main fuse or a power supply issue to the dashboard. I successfully elevated the trim on the driver's side and saw the substantial red cable. I measured the voltage, which registered at 12.5 volts, confirming the presence of electricity at this location. The electricity must thereafter go to the fusebox. It seems to extend from the driver's seat region to the fuse box. The thick red wire does not traverse the trunk to the passenger's left side. I verified that the thick red wire runs directly from the driver's side of the trunk to the driver's side interior, where I measured the voltage under the trim. The dashboard is devoid of electricity. I intended to measure the voltage entering the fuse box. I am uncertain where to verify. An picture of the fuse box and the glove compartment is attached. Could someone inform me where to locate the fuse box for voltage inspection? Could someone provide instructions on how to remove the glove compartment, since I am unable to locate the fuse box? This is my first effort at this endeavor. I own photos; but, I am unable to attach them or put links here. Perhaps I may provide the image URLs while replying to replies. Quote Link to comment Share on other sites More sharing options...
Alex1978 Posted August 14 Author Share Posted August 14 Image of a fuse box accompanied with a reference grid: https://ibb.co/BHGhP5s1 Quote Link to comment Share on other sites More sharing options...
Alex1978 Posted August 14 Author Share Posted August 14 https://ibb.co/p6FYdzWL Quote Link to comment Share on other sites More sharing options...
keithmerc220 Posted August 14 Share Posted August 14 The glovebox is secured by many T20 Torx screws; moreover, it is necessary to detach the trim around the cup holders and remove the cup holders themselves. Prior to proceeding, verify the transfer points where the battery voltage exits the boot; there should be two: one directs to the jump point under the bonnet, while the other connects to the fuse board. There have been problems with the power supply at the fuse board; BMW issued a recall on this matter some years ago. Quote Link to comment Share on other sites More sharing options...
Alex1978 Posted August 14 Author Share Posted August 14 Thank you for your response. What does "should be 2, 1" signify? 3) Jump point under the hood I checked the voltage at the jump terminal, which was capped in red. No voltage present. The vehicle is now off, so I assume there will be no voltage present. I am not a BMW technician, but I am attempting to resolve this issue. I measured the voltage on the wire under the trim on the driver's side, and it registered at 12.5 volts. I want to connect 12 volts from an additional battery to the fuse box and need guidance on the appropriate point for power input into the fuse box. This method allows me to start the vehicle and access the passenger door, since it is somewhat difficult to reach the fusebox and glovebox from the driver's side. The door is not opening from the inside due to a power failure. One would expect them to foresee such an occurrence. 7) Based on the photos of the fuse box, could you help indicate the source of electricity for the fuse box? It is a grid; thus, providing a reference point would be beneficial.I need the input power for the fuse box to see if it registers 12.5 volts. Thank you once again for your reply. Quote Link to comment Share on other sites More sharing options...
keithmerc220 Posted August 14 Share Posted August 14 Two transfer points. One of them provided the front of the automobile. The remaining materials include the fuse board. Is there an absence of electricity at the leap point? It should be continuously operational. Access the passenger footwell and detach the trim under the dashboard to locate the substantial red power supply line leading to the fuse board. Quote Link to comment Share on other sites More sharing options...
Alex1978 Posted August 14 Author Share Posted August 14 I am doing an investigation in search of a respite. Thank you for the information. Quote Link to comment Share on other sites More sharing options...
WordSmith Posted August 14 Share Posted August 14 I believe it was referred to as a B+ cable problem. Consider searching for it on Google and seeing some videos that may assist you. I had this issue with a vehicle, however unplugging the battery restored its functionality. You could consider doing this, since there is nothing to lose. Quote Link to comment Share on other sites More sharing options...
Alex1978 Posted August 14 Author Share Posted August 14 The B+ cable problem seems to correspond with all the symptoms. I will investigate further, thank you. Quote Link to comment Share on other sites More sharing options...
WordSmith Posted August 14 Share Posted August 14 Did you attempt to unplug the battery? It proved effective for me and allowed me to return home with the frozen groceries. Quote Link to comment Share on other sites More sharing options...
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