Question about 1998 Ford Econoline
The power lock system is stuck in the unlock mode. When I pull fuse 5 (20A) and reinstall it, the power locks energize the unlock mode and they stay in that mode. The normal 12 volts on the unlock wire is pulled to zero volts, indicating the module is stuck in this mode.
The rear door lock/unlock switch was the problem. When I took it apart, I found the wire connectors were corroded. I cleaned them up and it is now functioning well.
Posted on Jun 21, 2009
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Posted on Jan 02, 2017
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The CTD system commands the instrument cluster to control the telltale only when the ignition switch is OFF. The CTD system uses the telltale to identify system status.
Telltale FLASHING -- The system is in standby mode. The system is not ready to arm (a door is open).
Telltale ON STEADY -- The system is in delay mode. The system is ready to arm and is executing a time delay of 15 seconds before turning the lamp OFF and transitioning to armed mode.
Telltale OFF -- The system may or may not be armed.
Body Control Module (BCM) The body control module (BCM) monitors several inputs in order to arm and disarm the CTD system. The BCM controls the alarm function outputs. When the BCM detects an unauthorized entry (any door opened), the BCM applies ground to the horn, the park lamp and the headlamp relays. The BCM will send messages to the security telltale in the instrument cluster through the Class 2 serial data link. The BCM has the following 8 basic modes for operating the CTD system. The more detailed descriptions are below.
Arm initiated state
Arm delay state
The BCM has the following 6 discrete inputs in order to monitor the CTD system:
Driver door latch (door jamb) switch
Passenger door latch (door jamb) switch
Door lock relay
Door key switch
Passenger door unlock relay
The BCM applies ground once per second for approximately 2 minutes, or until a valid input to disarm the system is received by the BCM.
Check the door lock relay !
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Rotate the key from the center to the unlock position.
Press the horn button on the remote keyless entry transmitter.
Count the number of chimes that you hear. The number of chimes tells you which mode you have set.
Press the horn button again in order to change the mode. Continue to press the button until you hear the number of chimes that indicates the mode that you want.
Turn the key back to the center position and remove the key from the door key cylinder.
In order to exit and save the current feature customization modes use the following procedure:
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