Originally Posted by V2Rocket

easiest way to do this is:
1) run a fat new wire from battery back to the fuel pump.
2) mount new relay near fuel pump
3) attach fat new wire to relay terminal 30
4) add new wire from relay terminal 87 to fuel pump +
5) use stock Porsche fuel pump wiring on terminals 85 and 86 of new relay
6) add new ground wire from fuel pump to chassis

this way the DME relay is intact and functional with its safety features built in.
stock fuel pump wiring is just used to trigger the new fuel pump relay in the back. very minimal current flow now.

Originally Posted by cruise98

Have you checked the ground wire? it is connected to a stud between the tail lights and gets corroded over time.