Fuel pump relay - WHERE??? [Archive]

wool

09-30-2009, 07:06 PM

Can anyone tell me where the fuel pump relay resides? The car refuse to start. jumped the fuel pump with 12v and operated ok. Checked fuse ok. Spark OK. Cam position sensor OK. Crank sensor OK.

I have a 1995 (mfg 1/95) 530it and the ECU box ( right side) has a different layout then other e34's. I see 4 relays that sit below a row of connectors and a 50 amp fuse. Can't determin which one is fuel pump.

Thanks

shogun

09-30-2009, 11:10 PM

as long as you do not have in your profile the exact month and year of production, no one can tell in detail.
http://www.bmw-z1.com/VIN/VINdecode-e.cgi
and here are all ETM with info by production year, check it out, usually starts around page 15
E34 (1988 to 1995 5 Series) Wiring Diagrams
1988 e34_88.pdf (10,476,973 bytes) e34_88.zip (8,451,206 bytes)
1989 e34_89.pdf (10,863,822 bytes) e34_89.zip (8,588,005 bytes)
1990 e34_90.pdf (14,676,816 bytes) e34_90.zip (11,295,570 bytes)
1991 e34_91.pdf (18,332,496 bytes) e34_91.zip (13,399,412 bytes)
1992 e34_92.pdf (15,153,055 bytes) e34_92.zip (11,963,569 bytes)
1993 e34_93.pdf (15,214,090 bytes) e34_93.zip (11,994,722 bytes)
1994 e34_94.pdf (15,860,270 bytes) e34_94.zip (12,448,814 bytes)
1995 e34_95.pdf (15,392,094 bytes) e34_95.zip (11,897,304 bytes)
http://www.armchair.mb.ca/~dave/BMW/e34/

BennyM

10-01-2009, 02:04 AM

On my car, the fuel pump relay is blue. O2 heater relay is green. And the main DME relay is white. I'm not sure what the 4th relay is, but I bet it's a different color still.

Can anyone tell me where the fuel pump relay resides? The car refuse to start. jumped the fuel pump with 12v and operated ok. Checked fuse ok. Spatk OK. Cam position sensor OK. Crank sensor OK.

I have a 530it and the ECU box ( right side) has a different layout then other e34's. I see 4 relays that sit below a row of connectors and a 50 amp fuse. Can't determin which one is fuel pump.

Thanks

wool

10-01-2009, 06:15 AM

Thanks for the information. Very helpfull. I updated the specs.

Wool

wool

10-01-2009, 06:15 AM

Thanks Benny. I appreciate the info.

shogun

10-01-2009, 07:05 AM

make it for example like Benny has
1995 525iM 175,000 mi

visible under the name

see under user c/p

wool

10-01-2009, 07:36 AM

Ok

yaofeng

10-01-2009, 07:38 AM

Look up the electrical troubleshooting manual for your model year online. I've said many times every electrical component, down to the splice of every wire on your car is documented in the electrical troubleshooting manual with pictures.

wool

10-01-2009, 08:42 AM

Any other ideas on where the fuel pump relay is located?

wool

10-01-2009, 09:04 AM

Found it. Followed the color codes on that VERY helpfull wiring diagram.

wool

10-01-2009, 12:00 PM

Can anyone tell me where the fuel pump relay resides? The car refuse to start. jumped the fuel pump with 12v and operated ok. Checked fuse ok. Spark OK. Cam position sensor OK. Crank sensor OK.

I have a 1995 (mfg 1/95) 530it and the ECU box ( right side) has a different layout then other e34's. I see 4 relays that sit below a row of connectors and a 50 amp fuse. Can't determin which one is fuel pump.

Thanks

Thanks to each of you. The relay was bad. It"s located deep in the e-box.
Never saw this setup before. The fuel pump relay also powers the cooling fan in the e-box as well. that should be a diagnostic clue as well

Wool