Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1996CROWN VICTORIA POLICE INTERCEPTOR, 4.6 9REPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEWINDOWSPOWER WINDOW SYSTEMTESTINGONE-TOUCH DOWN FEATURE INOPERATIVE
1996 Ford Crown Victoria Police Interceptor, 4.6 9
One-Touch Down Feature Inoperative
1996 Ford Crown Victoria Police Interceptor, 4.6 9SECTION One-Touch Down Feature Inoperative
NOTE:
Vehicles with keyless entry system incorporate one-touch down feature in Driver's Door Module (DDM) located in left front door. Vehicles without keyless entry system have a separate one-touch down module located in left front door. Test procedures for one-touch down feature in vehicles without keyless entry are not available from manufacturer.
- One-Touch Down Feature Operation Test: Ensure standard power windows operate properly. Turn ignition on. Press driver's power window down switch for less than 1/2 second. If driver's window does not move all the way down, go to next step. If driver's window moves all the way down, go to step 5).
- Power Window Input To Driver's Door Module (DDM): Connect NGS tester to Data Link Connector (DLC). Turn ignition on. Access DDM. Request IGN_DDM PID. If PID indicates ACCESSORY, go to next step. If PID does not indicate ACCESSORY, repair Yellow/Light Green wire between instrument panel fuse panel and DDM. Retest system.
- DDM Logic Ground Test: Turn ignition off. Disconnect negative battery cable. Unplug 18-pin connector from DDM located in left front door. Check for continuity of Black wire between connector and ground. If continuity exists, reconnect 18-pin connector and battery. Go to next step. If there is no continuity, repair open in Black wire. Retest system.
- Window Operation Test: Turn ignition on. Actuate window fully up and down several times while observing motion of window. If window moves smoothly, replace DDM. See DRIVER'S DOOR MODULE (DDM) under REMOVAL & INSTALLATION. Retest system. If window moves in an uneven, jerking manner, service regulator mechanism for sticking and binding.
- Cancel With Up Switch Test: Actuate window fully up. Press driver's power window down switch for less than 1/2 second. While window is in motion, press driver's window switch to UP position. If window stops, system is operating normally. If window does not stop, go to next step.
- Power Window Input To Driver's Door Module (DDM): Connect NGS tester to Data Link Connector (DLC). Turn ignition on. While pressing driver's window switch to UP position, request LFPW_SW PID. If PID indicates UP, replace DDM and retest system. See DRIVER'S DOOR MODULE (DDM) under REMOVAL & INSTALLATION. If PID does not indicate UP, repair Tan/Black wire between master switch and DDM. Retest system.
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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.