Mercury Sable 1998 Owner's Manual page 123

4. Make the final connection of the negative (-)
cable to an exposed metal part of the stalled
vehicle's engine, away from the battery and the
carburetor.
The preferred locations of an exposed metal part (to
ground the circuit) are the alternator mounting
brackets or an engine lifting eye. Do not use fuel
lines, engine rocker covers or the intake manifold as
grounding points.
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. Be sure that the cables are clear of fan blades,
belts and other moving parts of both engines.
Roadside emergencies
123