Andre3000 55 Report post Posted April 1, 2011 I'm (my sparky) is having trouble with the connection between loom and fusebox in my m30e30. Can anyone help me find the 20 pin layout for a 1989 nz new 325i motronic 1.1 loom - loom side of the plug i also need the 20 pin layout for a 1989 jap 320i with motronic 1.3 - fusebox side of the plug. Im half writing this for Brent but also if anyone else can help that would be awsome. When i say layout i need colours and pin numbers, and im pretty sure i've seen one of these diagrams before but i cant find it now. cheers guys Quote Share this post Link to post Share on other sites
tire 10 Report post Posted April 1, 2011 You can come look at mine if it would help. Mine is just M30 engine loom straight onto M20 fuse box loom at c101, with an extra wire for tacho... Quote Share this post Link to post Share on other sites
Andre3000 55 Report post Posted April 1, 2011 (edited) You can come look at mine if it would help. Mine is just M30 engine loom straight onto M20 fuse box loom at c101, with an extra wire for tacho... im not sure if it would as pfl fusebox wiring colours is probably a diff colour to the facelift. and im unsure if the m30 loom is the same colours/pin placement as the m20. Edited April 3, 2011 by André3000 Quote Share this post Link to post Share on other sites
polley 916 Report post Posted April 1, 2011 Wtf, its only a handful of wires you need at the C101. Here are e30 wiring diagrams. http://www.armchair.mb.ca/~dave/BMW/e30/ Hope they help. You can use a multimeter to find what the wires do on the m30 side easy enough. Quote Share this post Link to post Share on other sites
Silver Fox 43 Report post Posted April 1, 2011 http://www.e30.de/335i/00.htm Very handy. Quote Share this post Link to post Share on other sites
BM WORLD 1286 Report post Posted April 1, 2011 E34 uses a round style connector to plug into the fuse box. This has 20 pins so I will list what the wires in each of those do. Pin 1, BU goes to the alternator. Comes from the Instrument Cluster "charge indicator" light. BU in the fuse box. Pin 2, GN/YL comes from oil lever sensor. It is BU/BK in the fuse box and runs to the static oil level active check control unit, which is the same as the oil level light. Pin 4, BR/VI comes from the coolant temp sender unit. It is BR/VI in the fuse box and goes to the Instrument cluster temp gauge. Pin 5, BR/GN Oil pressure switch. Runs to instrument cluster oil pressure light. Pin 6, GN/WH goes to the O2 sensor heater relay. Gets power from fuse 9 and in the fuse box is colored GN/YL. Pin 7, GN comes from the ignition switch and goes to the Start Input, in the motronic unit and it also goes to Pin 15 on the coil. In the fuse box it is colored GN. Pin 8, WH/BK comes from the motronic unit "present fuel rate output". Is YL/WH in fuse box and runs to Fuel Economy Gauge in the bottom of the tach. Pin 9, BK goes to the ECU Engine speed output. This is BK in the fuse box. On the E28 this actually should be the connected in C103. Pin 10, BU comes from the oil level sensor. It is VI/GN in the fuse box and goes to the active check control unit as the dynamic oil level light. Pin 11, WH/GN comes from Pin 7 of the diagnostic connector. Is WH/BU in the fuse box and goes to the Service Indicator Processor. Pin 12, GY comes from the ECU and is the trigger for the "Check Engine" light control. In the fuse box it is BR/BK. This wire is not used on the E28, since there is no check engine light. Pin 13, GN/VI comes from Pin 87 of fuel pump relay. Is VI/RD in fuse box and runs to Fuse 11. Pin 14, BK/WH comes from motronic unit "Speed Signal Input". Is BU/YL in fuse box and goes to the Speed Input of the Instrument Cluster. Pin 15, BK/GN comes from Pin 30h on the coil. In the fuse box it is BK/GN and runs to the unloader relays. Pin 16, WH/BK comes from Pin 6 of diagnostic connector and is used in the SRS system. In the fuse box it is WH/BK and is said to be not used. Pin 18, BK/YL is the starter trigger and comes from in the car. It is also BK/YL in the fuse box. It also runs to Pin 11 of the diagnostic connector. Pin 20, RD/YL comes from Pin 87 of the main relay. It is RD/YL and goes to power the ABS Hydraulic Unit. Quote Share this post Link to post Share on other sites
Andre3000 55 Report post Posted April 2, 2011 Im using a e30 m20b25 harness motronic 1.1 will this plug be the same as the e34? Quote Share this post Link to post Share on other sites
GURLB8 0 Report post Posted April 3, 2011 (edited) The problem with Andre 3000's loom is this, at pin 20 of the c101 connector runs a red wire with a white trace, this wire comes from the main efi relay so it has a 12v positive feed on it when the ignition is switched on, on the fuse box side of the c101 connector at pin 20 is a brown wire, brown = earth so when the ignition is switched on smoke and destruction happens due to a short circuit to ground. So obviously the looms supplied cannot be a matched pair, Either a correct loom is needed or the right information to correct this loom to do the job. If anyone has the right info/parts/experience feel free to get typing. **edit** Problem now solved, the burnt wire from the efi main relay is to power up the abs, this engine loom has now been fitted to a car without abs which has an earth wire instead of the wire to power up the abs control unit. The wire in question will be removed as it's not required. Edited April 4, 2011 by GURLB8 Quote Share this post Link to post Share on other sites
