Ford 2006 Grand Marquis Owner's Manual page 206

Roadside Emergencies
3. Remove the jumper cable from the positive (+) terminal of the booster
vehicle's battery.
4. Remove the jumper cable from the positive (+) terminal of the
disabled vehicle's battery.
After the disabled vehicle has been started and the jumper cables
removed, allow it to idle for several minutes so the engine computer can
relearn its idle conditions.
206
2006 Grand Marquis (grn)
Owners Guide (post-2002-fmt)
USA (fus)