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"Door open" warning from sliding door


I am driving a Ford Transit from 2008 and I keep getting a door open signal from the sliding door when I drive over bumpers or around curves even though the door is closed.

When I lock the doors with the light on it closes, but the lights stay on and the horn goes off. What could that be?



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I Have a Ford Tranzit F250. , 2015 ! The slide door get closed and locked , but it shows as alert that the door is opened ! Turns the light on and makes that sound ! It hapens more after a rain ! If anyone can help plz


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Hi @destard

Sounds like you have a faulty pinswitch in the door frame or the wire connected to it is shorting out to the chassis. The switch is manually released and operated by the door opening and closing

Not sure with your model but think that it is located on the right hand side of the door opening.

Sometimes the switch gets corroded and goes s/c (short circuit). Switch should be s/c (in released position)when door open and o/c (open circuit when switch pushed in) when the door is closed

You need to remove the switch from the chassis and test it with an Ohmmeter to prove that it is working correctly.

If the switch is OK then perhaps the wire connected to it is earthed somewhere. The insulation could be rubbed or the wire could be pinched and it is shorting out to the chassis.

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