1999 Mercury Cougar 2.5 L, StandardFACTORY OEM SERVICE PROCEDURE

Key Programming - Without Using 2 Programmed Keys

Insert unprogrammed key in ignition and turn ignition switch to RUN position. Connect New Generation Star (NGS) tester to Data Link Connector (DLC), located under instrument panel next to steering column. Insert Ford Service Function (FSF) card in NGS tester. Perform security access procedure. See KEY PROGRAMMING - SECURITY ACCESS PROCEDURE. Select IGNITION KEY CODE PROGRAM. Turn ignition switch to LOCK position. Disconnect NGS tester. Key should now be programmed and be able to start vehicle.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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