Tip & How-To about Ford Taurus

Door adjar light stuck on on your Ford, Lincoln, or Mercury?

This is a common problem for these makes. They use a door ajar switch that is attached to the door latch assembly. The most common one to fail is the driver front.

Something you can try is clean the out side of the door latch, the part that actually holds the door shut, with brake clean. Don't be afraid to liberally spray into the latch assembly. Let it dry and then liberally spray the same area with penetrating lube. Again don't be afraid to spray it in every nook and cranny you can get into. Then open and close the door several time. Spray it again with the penetrating lube and repeat a couple of times.

If the door ajar light goes out when the door is closed problem solved. If the light continues to stay on you have two options.

1. Your can remove all the door panels and unplug the door switches one at a time until the door ajar light goes out. Again the switch is located on the latch assembly and has a two wire connector. Once you find the one that is stuck you can remove it and either clean it/lube it until it starts to work again or replace it. The switches twist into position in the latch assembly and if it's your first one it may be easier for you to remove the latch from the door to understand how the switch is attached. Neither is an easy task your first time.

2. You can have a shop use a scan tool to communicate with the GEM module to see what switch is stuck open. You can then focus on that door. There will be a diagnostic charge for this. Call around and see what various shops in your area charge for this. They will know exactly what you are talking about when you explain the problem as it is very common.

Hope that helps!

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1 Answer

door chime always on


You have one or more defective door ajar switches inside the door attached to the door latch assembly. This is a common problem and I have replaced at least 100 of them. Most likely it is the drivers door switch that is the problem, but since you must remove the door panel and rear door glass run channel to access the door ajar switch (and then it is still a pain) it is best to have the system read with a scanner to see which switch or switches is acting up. There is no easy way to disable the warning as it is a electronically controlled chime.

Feb 23, 2017 | Ford Cars & Trucks

1 Answer

I have a 2002 taurus and the dome light stays on and the locks click up and down. The door light stays on and after a while of driving it will click off and buzz.


This is coming for ford products. They use w door ajar switch that is attached to the door latch assembly. The most common one to fail is the driver front.

Something you can try is clean the out side of the door latch, the part that actually holds the door shut, with brake clean. Don't be afraid to liberally spray into the latch assembly. Let it dry and then liberally spray the same area with penetrating lube. Again don't be afraid to spray it in every nook and cranny you can get into. Then open and close the door several time. Spray it again with the penetrating lube and repeat a couple of times.

If the door ajar light goes out when the door is closed problem solved. If the light continues to stay on you have two options.

1. Your can remove all five door panels and unplug the door switches one at a time until the door acharya light goes out. Again the switch is located on the latch assembly and has a two wire connector. Once you find the one that is stuck you can remove it and either clean it/lube it until it starts to work again or replace it. The switches twist into position in the latch assembly and if it's your first one it may be easier for you to remove the latch from the door to understand how the switch is attached. Neither is an easy task your first time.

2. You can have a shop use a scan tool to communicate with the GEM module to see what switch is stuck open. You can then focus on that door. There will be a diagnostic charge for this. Call around and see what various shops in your area charge for this. They will know exactly what you are talking about when you explain the problem as it is very common.

Hope that helps. Let us know what you find!

Jun 29, 2011 | 2001 Ford Taurus

2 Answers

I have a 2002 ford explorer sport and my door ajar is on and all the doors are shut and the dome light stays on constantly.. Is this common and how can i fix this?


Yes this is coming for ford products. They use w door ajar switch that is attached to the door latch assembly. The most common one to fail is the driver front. Something you can try is clean the out side of the door latch, the part that actually holds the door shut, with brake clean. Don't be afraid to liberally spray into the latch assembly. Let it dry and then liberally spray the same area with penetrating lube. Again don't be afraid to spray it in every nook and cranny you can get into. Then open and close the door several time. Spray it again with the penetrating lube and repeat a couple of times. If the door ajar light goes out when the door is closed problem solved. If the light continues to stay on you have two options. 1. Your can remove all five door panels and unplug the door switches one at a time until the door acharya light goes out. Again the switch is located on the latch assembly and has a two wire connector. Once you find the one that is stuck you can remove it and either clean it/lube it until it starts to work again or replace it. The switches twist into position in the latch assembly and if it's your first one it may be easier for you to remove the latch from the door to understand how the switch is attached. Neither is an easy task your first time. 2. You can have a shop use a scan tool to communicate with the GEM module to see what switch is stuck open. You can then focus on that door. There will be a diagnostic charge for this. Call around and see what various shops in your area charge for this. They will know exactly what you are talking about when you explain the problem as it is very common. Hope that helps. Let us know what you find!

Jun 25, 2011 | Ford Explorer Sport Cars & Trucks

2 Answers

door ajar keeps sounding


spray the latch assembly on all doors with WD-40. Open and close all doors multiple times.
THIS IS WHAT THE DEALER MECH WILL DO.
tech note it is a common problem for the door switch to get sticky. keep them clean.

Jul 12, 2009 | 2002 Ford Explorer

1 Answer

door ajar stays on usually when it rains


Try opening and closing all four doors one at a time to determine which door ajar sensor has failed. Probably driver door. Sensor is located in door latch assembly and is a challenge for first timers. This is a common problem with these vehicles.

Mar 29, 2009 | 1999 Ford Expedition

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