How to run the fuel pump without starting?

[speeding-g60]

FWIW, on the relay, 30 is power in, always connected to the 87A. when the coil of the relay is hit with opposing polarity (prob 85 and 86 in this case) then it switches the 30 output to 87.

follow?

typical Bosch style relay.

85 coil pole A
86 coil pole b
30 input
87A output from 30 when not energizing the coil
87 output from 30 while energizing the coil with opposite polarity.

[UrS4boy]

You don't need to jumper all three... Remove relay 10 in the main fusebox and bridge terminals 48 and 52 - these map to terminals 30 and 87 on the relay - this then runs the fuel pump.

Even easier, at least with an UrS4. You just remove the fuel pump fuse (which is AFTER the FP relay on a C4) and apply + power to the downstream (the one closest to the back of the car) fuse terminal (which is No. 17 on an UrS4/6)