1986 Mercury Sable LS, 4D SedanFACTORY OEM SERVICE PROCEDURE

Description & Preliminary Information

Ensure battery is fully charged. Disconnect and reconnect battery to reset system. If any of the specific complaints that follow seem to be the problem, go to the appropriate Pinpoint Test. If none of the following complaints are the problem, go to step 1).

Fig 1: Ford Motor Co. Keyless Entry System Wiring Diagram
G25252
KEYLESS ENTRY PROBLEMS & TESTS

Complaint Pinpoint Test/Step
Locks bind when manually operated E/1)
No operation in freezing temperatures E/7)
Operates only with engine running E/8)
Operates intermittently E/6)
No illuminated entry manually, but operates w/Keyless Entry D/1)
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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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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