How to disconnect door ajar signal on dash ?

The signal for that comes from the switch in the door to the Body Control Module and from there to the light in the dash. You need to get the damage fixed.

You can disconnect the battery, but then you will have to reset the security and immobilizer each time. There are also various learning procedures involved after a battery disconnect. Your best bet is a battery charger overnight.

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i replaced drivers door adjar switch ,door adjar light still on????? one of the other door ajar switch is bad . Your best bet , take it to a qualified repair shop that has the diagnostic tools an knowledge to diagnose the problem . Not just guess an replace parts .Factory or professional scanner needed
DDM Diagnostic Trouble Code (DTC) Index
DTC Description DTC Caused By Action B1322 Door Ajar LF Circuit-Short to Ground DDM GO to Pinpoint Test B . B1342 ECU-Defective DDM REFER to Section 419-10 . B1566 RF, LR, RR Door Ajar Circuits Short to Ground DDM GO to Pinpoint Test B . For a complete listing of all DDM DTCs, GO to Section 419-10 .
Driver door also has control module DDM - driver door module .

• The interior lamps stay on continuously

• Circuitry.
• Switches.
• Driver door module (DDM).
• Lighting control module (LCM).

• GO to Pinpoint Test B .

Ford Factory service repair info. pin point test .

PINPOINT TEST B: THE INTERIOR LAMPS STAY ON CONTINUOUSLY Test Step Result / Action to Take B1 USE THE RECORDED RESULTS FROM LCM SELF-TEST

• Use the recorded results from LCM self-test.
• Are any DTCs recorded?

Yes
DTC B1688, GO to B13 .

DTC 1342, GO to B15 .

For all other DTCs, REFER to Section 419-10 .

No
GO to B2 . B2 USE THE RECORDED RESULTS FROM DDM SELF-TEST

• Use the recorded results from DDM self-test.
• Are any DTCs recorded?

Yes
DTC B1322, GO to B3 .

DTC B1566, GO to B4 .

No
GO to B3 . B3 CHECK THE DRIVER DOOR AJAR INPUT - MONITOR THE DDM PID D_DR_DD

• Monitor the DDM PID D_DR_DD while opening and closing the driver door.
• Does the DDM PID value agree with the switch positions?

Yes
GO to B4 .

No
GO to B10 . B4 CHECK THE PASSENGER DOOR AJAR INPUT - MONITOR THE DDM PID P_DR_DD

• Monitor the DDM PID P_DR_DD while opening and closing the LR, RF, and RR doors.
• Do the DDM PID values agree with the switch positions?

Yes
GO to B12 .

No
GO to B5 . B5 CHECK THE RF, RR, AND LR DOOR AJAR SWITCHES - MONITOR THE DDM PID P_DR_DD

• Key in OFF position.
• Disconnect door ajar switches C602a, C715, and C820a.
• Key in ON position.
• Monitor the DDM PID P_DR_DD.
• Does the DDM PID indicate AJAR?

Yes
GO to B9 .

No
GO to B6 . B6 CHECK THE RF DOOR AJAR SWITCH - MONITOR THE DDM PID P_DR_DD

• Key in OFF position.
• Connect: RF Door Ajar Switch.
• Close the RF door.
• Key in ON position.
• Monitor the DDM PID P_DR_DD.
• Does the DDM PID indicate AJAR?

Yes
INSTALL a new RF door ajar switch. TEST the system for normal operation.

No
GO to B7 . B7 CHECK THE RR DOOR AJAR SWITCH - MONITOR THE DDM PID P_DR_DD

• Key in OFF position.
• Connect: RR Door Ajar Switch.
• Close the RR door.
• Key in ON position.
• Monitor the DDM PID P_DR_DD.
• Does the DDM PID indicate AJAR?

Yes
INSTALL a new RR door ajar switch. TEST the system for normal operation.

No
GO to B8 . B8 CHECK THE LR DOOR AJAR SWITCH - MONITOR THE DDM PID P_DR_DD

• Key in OFF position.
• Connect: LR Door Ajar Switch.
• Close the LR door.
• Key in ON position.
• Monitor the DDM PID P_DR_DD.
• Does the DDM PID indicate AJAR?

Yes
INSTALL a new LR door ajar switch. TEST the system for normal operation.

No
GO to B16 . B9 CHECK CIRCUIT 627 (BK/OG) FOR SHORT TO GROUND

• Key in OFF position.
• Disconnect: DDM C501b.
• Measure the resistance between DDM C501b pin 6, circuit 627 (BK/OG), and ground.
• Is the resistance greater than 10,000 ohms?

Yes
GO to B16 .

No
REPAIR circuit 627 (BK/OG). TEST the system for normal operation. B10 CHECK THE DRIVER DOOR AJAR SWITCH - MONITOR THE DDM D_DR_DD

• Disconnect: Driver Door Ajar Switch C526a.
• Close the driver door.
• Key in ON position.
• Monitor the DDM PID D_DR_DD.
• Does the DDM PID indicate AJAR?

Yes
GO to B11 .

No
INSTALL a new driver door ajar switch. TEST the system for normal operation. B11 CHECK CIRCUIT 867 (DB) FOR OPEN

• Key in OFF position.
• Disconnect: DDM C501b.
• Measure the resistance between DDM C501b pin 5, and driver door ajar switch C526a, circuit 867 (DB).
• Is the resistance less than 5 ohms?

Yes
GO to B16 .

No
REPAIR open in circuit 867 (DB). TEST the system for normal operation. B12 CHECK CIRCUIT 53 (BK/LB) FOR SHORT TO BATTERY VOLTAGE

• Key in OFF position.
• Disconnect: LCM C2145c.
• Key in ON position.
• Measure the voltage between LCM C2145c pin 11, circuit 53 (BK/LB), and ground.
• Is the voltage greater than 10 volts?

Yes
REPAIR circuit 53 (BK/LB). TEST the system for normal operation.

No
GO to B15 . B13 CHECK THE DOME LAMP INPUT - MONITOR THE LCM PID DOMESW

• Monitor the LCM PID DOMESW while pressing and releasing the dome lamp switch.
• Does the LCM PID value agree with the switch positions?

Yes
GO to B15 .

No
GO to B14 . B14 CHECK THE HEADLAMP SWITCH - MONITOR THE LCM PID DOMESW

• Key in OFF position.
• Disconnect: Headlamp Switch.
• Monitor the LCM PID DOMESW.
• Does the LCM PID value indicate OFF?

Yes
INSTALL a new headlamp switch. REFER to Section 417-01 . TEST the system for normal operation.

No
REPAIR circuit 1034 (BK/WH). TEST the system for normal operation. B15 CHECK FOR CORRECT LCM OPERATION

• Disconnect all LCM connectors.
• Check for:
  • corrosion
  • pushed-out pins
• Connect all LCM connectors and make sure they seat correctly.
• Operate the system and verify the concern is still present.
• Is the concern still present?

Yes
INSTALL a new LCM. REFER to Section 419-10 .

CARRY OUT DATA LINK DIAGNOSTIC test.

No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. B16 CHECK FOR CORRECT DDM OPERATION

• Disconnect all DDM connectors.
• Check for:
  • corrosion
  • pushed-out pins
• Connect all DDM connectors and make sure they seat correctly.
• Operate the system and verify the concern is still present.
• Is the concern still present?

Yes
INSTALL a new DDM. REFER to Section 419-10 .

CARRY OUT DATA LINK DIAGNOSTIC test.

No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

The window indexing feature is used to lower the driver and passenger power windows approximately 4 mm when the door is opened. This is necessary to allow the top edge of the window to clear the window weather-strip. This feature will also raise the window to the fully seated position once the door is closed.
Is just the driver door not working ?
Observe the operation of the driver window and front passenger window while opening and closing their respective doors. The windows should index DOWN and UP when the doors are opened and closed.
? If either window does not index UP or DOWN, refer to Window Index Feature Malfunction.

Window Index Feature Malfunction
Ignition ON, observe the scan tool Driver Door Ajar Sw and Door Ajar Switch parameters while opening and closing the driver and passenger doors, the parameter should change from Door Closed to Door Ajar.
? If the parameter does not change when opening and closing the doors, refer to Door Ajar Indicator Malfunction .
Ignition OFF, disconnect the harness connector at the appropriate window motor.
Ignition ON, with the door closed, test for greater than 10 volts between the signal circuit terminal 5 and ground.
? If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
With the door open, test for less than 1 volt between the signal circuit terminal 5 and ground.
? If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
If all circuits test normal, replace the window motor.

Your best bet mite be to take your vehicle to a qualified repair shop (GM dealer )

It should tell you which one .
Driver Door Ajar Malfunction
Passenger Door Ajar Malfunction
If not a scan tool would be the best way.
Ignition ON, observe the scan tool Driver Door Ajar Sw parameter while opening and closing the driver door. The parameter should change between Door Closed and Door Ajar
? If the parameter does not change, refer to Driver Door Ajar Malfunction.
With the passenger doors closed, observe the scan tool Door Ajar Switch parameter while opening and closing each door. The parameter should change between Door Closed and Door Ajar.
? If the parameter does not change, refer to Passenger Door Ajar Malfunction

Ignition OFF, disconnect the harness connector at the driver door latch.
Test for less than 5 ohms between the ground circuit terminal 8 and ground.
? If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, verify the scan tool Driver Door Ajar Sw parameter is Door Closed.
? If not the specified value, test the signal circuit terminal 6 for a short to ground. If the circuit tests normal, replace the BCM.
Install a 3A fused jumper wire between the signal circuit terminal 6 and the ground circuit terminal 8. Verify the scan tool Driver Door Ajar Sw parameter is Door Ajar.
? If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
If all circuits test normal, test or replace the driver door latch

You wrote ''The dash is signalling that there is a door ajar somewhere when there is not''.

Car will not lock doors if all doors aren't closed so that's why you can't lock your door.

Car is thinking that doors aren't closed .
Just look for all doors latch and closed door contact switches.
You will find one or more that isor are not working.

Change those door contacts and everything will work fine.

This is not a good thing. Ford uses a computer called the GEM and that means General Electronics Module. It controls:

• Low Coolant Indicator On Cluster
• Brake Indicator on Cluster
• DRL - Control
• Wipers
• AutoLamps
• Rear Defrost
• Interior Lamps(dome)
• High Beam Indicator only (cluster)
• Low Coolant indicator
• Key-in Buzzer
• Seatbelt indicator only (Cluster)
• Trunk Pop Relay
• Power Locks
• Door Ajar Sensors
• Door Keyless entry pad
• Remote Keyless Entry
• One Touch Down (power window)
• Air Bag Tone
• Anti Theft (perimeter Alarm) (SEL, or SE(s) with mods)
• Lift gate ajar (wagon)
• Liftgate Pop
• Accessory Delay signal (accessory that work after engine off, prior to door ajar)
• Battery Saver Relay signal (accessory that work after engine off, 15 mins) Map lights, vanity mirrors

They are located behind the radio in the dash and they are $$$ about 600 USD.

very common check inthe door jam and see if the leaver which is usually black moves freely may have a wire disconnected from that

Most likely a door jab switch in a door,most likely the drivers door.

there should be a switch mounted( or more than one) in the door jamb that tells the car when the car door is open...i will probably look like a little plastic plunger...might be broken off or bad internally

the door ajar switch in the drivers door latch is is either shot or sticking.open drivers door spray some WD40 in the latch,open and close door several times and if the switch is only sticking this will free it up.