I would just upgrade the wiring going to the fuel pump (bypass the inertia switch or integrate it into the control side of the relay) and rewire the existing control into the new relay. Feed the high current side of the relay (going to the pump) from a direct DC source under the hood. Make sure your ground is good also going to the fuel pump.. 1979 to 2017 Mustang Diagrams Mustang Diagrams including the Fuse Box and Wiring Schematics for the following year Ford Mustangs: 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014.
Any body know where I can find these. More specifically some that include the schematics for the fuel pump. Thanks before hand.. Quick Links: Mustang Electrical and Vacuum diagrams. 94 & 95 Mustang Electrical and Vacuum diagrams. Mustang Cylinder Head, Basic Mods, Engine Mechanical Information. Mustang EEC IV 5.0 HO Information. Note: Some of this may be A9L Specific! Mustang Automatic and Manual Transmission Information. Mustang Electrical and Vacuum diagrams. Awesome color wiring diagram, by TMoss, for the 88-91.