Lincoln 2009 Navigator Owner's Manual page 309

4. Make the final connection of the negative (-) cable to the jump
starting stud located in the engine compartment, near the washer fluid
bottle. Do not use fuel lines, engine rocker covers or the intake manifold
as grounding points.
Note: Do not attach the negative (-) cable to fuel lines, engine rocker
covers, the intake manifold or electrical components as grounding
points.
WARNING: Do not connect the end of the second cable to the
negative (-) terminal of the battery to be jumped. A spark may
cause an explosion of the gases that surround the battery.
5. Ensure that the cables are clear of fan blades, belts, moving parts of
both engines, or any fuel delivery system parts.
2009 Navigator (nav)
Owners Guide, 2nd Printing
USA (fus)
Roadside Emergencies
309