1998 Ford Mustang Base, 2D Convertible, AutomaticFACTORY OEM SERVICE PROCEDURE

Test C: One-Touch Down Feature Inoperative

  1. Check Power Supply To One-Touch Module  - Remove driver's door trim panel. Access module located in driver's door. Turn ignition switch to RUN position. Check for voltage on Pink or Light Blue/Black wire at one-touch down module connector. If battery voltage is present, go to next step. If battery voltage does not exist, repair open in Pink or Light Blue/Black wire between instrument panel fuse block and one-touch down module. Retest system operation.
  2. Check One-Touch Down Module Ground Circuit  - Using an ohmmeter, check resistance between ground and Black wire at one-touch down module connector. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open in Black wire. Retest system operation.
  3. Check One-Touch Module Switch Sense  - Press and hold master window switch left door window in DOWN position. If left door window glass goes down, replace one-touch down module and retest system operation. If left door window glass does not go down, go to TEST B: SINGLE POWER WINDOW INOPERATIVE  .
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When to See a Mechanic

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

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