Ford Navigator 2003 Owner's Manual page 283

Roadside Emergencies
3. Connect the negative (-) cable to the negative (-) terminal of the
assisting battery.
4. Make the final connection of the negative (-) cable to the jump
starting stud located in the rear of the engine compartment, near the
battery. Do not use fuel lines, engine rocker covers or the intake
manifold as grounding points.
283
2003 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus)