Porsche Cayenne 3.2 2004 Right fuel pump don't have power

[Porsche 2004]

Good afternoon,

Porsche Cayenne 955 3.2 of 2004 with new Pumps filter and sender.

After a lot of tests and checking Interior Wiring Harness and replacing fuses 13 and 14 as well as realays I didn't find anything wrong apparently, because after testing the current with the car working I verify that the pump on the left has 13.3V and the one on the right with only 3V. I deduce that the right pump does not reach current, because if the left pump is switched off after a short time, the car shuts off. Can you give me any ideas for solving the problem? I'm desperate. Thanks.