Ford 4000 Wiring Diagram - Ford 9N & 2N wiring parts. Including switches, cutouts, voltage regulators, ammeters, battery hold down, battery cables, spark plug wires, spark plugs, resistor block and wiring harness.. Delegation strategies for the NCLEX, Prioritization for the NCLEX, Infection Control for the NCLEX, FREE resources for the NCLEX, FREE NCLEX Quizzes for the NCLEX, FREE NCLEX exams for the NCLEX, Failed the NCLEX - Help is here. WARNING: On radios with more than four pins you may often find that there is a voltage present on one or more of the other pins. If you short this pin to earth or to another pin you may damage the set. Do not use the method below for checking the radio wiring if this is the case..