Fuel Pump Relay
WARNING: This page does not describe the selected car, but rather 35 other vehicles, including the 2003 BMW Z8, 2003 BMW Z4, 2003 BMW X5, 2003 BMW M5, and 2003 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
If relay does not work on vehicle, check battery feed, DME relay, PCM and ground circuits at fuel pump relay.
Remove fuel pump relay. Apply battery voltage to relay terminal No. 30 and terminal No. 86. See Fig 1. Ground relay terminal No. 85. Voltage should now exist at relay terminal No. 87. Replace relay if it does not work as indicated.