|
Registered
Join Date: May 2000
Location: Los Alamos, NM, USA
Posts: 6,044
|
The factory shop manual 1977 911 wiring diagram shows black as the hot (+) wire between the fuel pump relay and the fuel pump. A brown wire is shown between the fuel pump and ground. The DC electric fuel pumps can be damaged if connected with the polarity backward. This would be a good time to loosen the fuel tank drain bung and drain the tank of old gas and check the bung screen for rust and other debris. Also replace the rubber fuel lines between the tank, pump and center tunnel lines. Cheers, Jim
|