Rear left door ajar

Tiny
TBARRY1989
  • MEMBER
  • 2010 FORD F-150
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 109,000 MILES
Hey, this will be a little bit of a post but I’ll try to give you the full picture. I have the truck listed above XLT model. My rear left door would not lock or unlock automatically, always had to manually do it. My dash would always say rear right door ajar. I researched a couple things and went to AutoZone and picked up a new actuator. I get it all put back together and still nothing trying to lock/unlock automatically. I went back and did some more research and saw all the video about the wiring slowly cracking between the frame of the truck and the door. I looked at it and sure enough I had one wire completely cut and multiple that were getting there. I ended up putting electrical tape around the ones still in tact and used a butt connector for the one completely cut. I taped it all up and put it back together. I decided to also look at the right rear door since that was what the dash was saying was ajar. Sure enough also there I had one wire completely cut. I placed a butt connector on that one and taped it all back together and put it back. I get in the drivers seat turn the keys and the dash now says rear left door ajar. The actuator worked for the automatic locks. I decided to buy a whole new wire harness for the rear left door. I got that in today and put it all in. Turned the keys and dash still says rear left door ajar. I tried to disconnect the negative on the battery to maybe reset something and still there. So where I am sitting right now is dash says rear left door ajar when door is closed, a brand new actuator in the rear left door that works for automatic locks, and a brand new wire harness for the rear left door. Looking for any suggestions that you guys might have. Thank you.
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Sunday, June 28th, 2020 AT 3:20 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
There is a door ajar switch on the latch assembly. Make sure it is connected and tight. I attached a pic of what you are looking for.

Note that the switch may be bad. Confirm by disconnecting the switch and checking continuity through it while actuating it on and off.

You will need to remove the lower rear door latch assembly. Here are directions for doing it:
________________________

2010 Ford Truck F 150 2WD V8-4.6L VIN 8
Rear Door Latch - Lower, Super Cab
Rear Door Latch - Lower, Super Cab
REAR DOOR LATCH - LOWER, SUPER CAB
501-14 Handles, Locks, Latches and Entry Systems 2010 F-150
REMOVAL AND INSTALLATION
Rear Door Latch Lower, SuperCab

pic 2

Item Part Number Description
1 W714092 Lower door latch bolts (3 required)
2 18264A01 / 18264A00 Lower door latch and cable (LH/RH)
Removal and Installation

Remove the rear door trim panel. For additional information, refer to Section 501-05.
Position the water shield aside.
Disconnect the door ajar switch electrical connector.
Disconnect the lower door latch actuating cable from the interior door handle.
Remove the interior door handle actuating cable from the guide clips.
Remove the 3 lower door latch bolts and the lower door latch.
To install, tighten to 12 Nm (106 lb-in).
To install, reverse the removal procedure.

________________________

Here are the directions for removal of the door ajar switch:

________________________

2010 Ford Truck F 150 2WD V8-4.6L VIN 8
Door Ajar Switch - Rear, Super Cab
Vehicle Sensors and Switches Sensors and Switches - Lighting and Horns Door Switch Service and Repair Removal and Replacement Door Ajar Switch - Rear, Super Cab
DOOR AJAR SWITCH - REAR, SUPER CAB
501-14 Handles, Locks, Latches and Entry Systems 2010 F-150
REMOVAL AND INSTALLATION
Door Ajar Switch Rear, SuperCab

pic 3

Item Part Number Description
1 18265B29 Door ajar switch
2 18264A01 / 18264A00 Lower door latch (LH/RH)
Removal and Installation

Remove the lower rear door latch. For additional information, refer to Rear Door Latch Lower, SuperCab in this section.
Insert a screwdriver or suitable tool into the opening on the door latch and push up on the tab.

Pic 4

Rotate the door ajar switch and remove from the door latch.
To install, reverse the removal procedure.

____________________________

Let me know what you find.

Joe
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Sunday, June 28th, 2020 AT 9:09 PM
Tiny
TBARRY1989
  • MEMBER
I might be wrong with this latch assembly. Reading through what you said I must have the wrong latch. The latch assembly for a 2010 F-150 XLT 4.6 is one part. The sensor is built into the latch. And that latch is brand new from AutoZone. It may be a bad part they sold me but I don t see a separate ajar sensor.
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Sunday, June 28th, 2020 AT 10:05 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

I'm not sure. The info I sent was straight from Alldata. They are usually very reliable. Your truck is a super cab, correct? Or, is it a super crew cab? Also, can you take a pic of what you have so I can see it? Does it look like the pic below?

Joe
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Sunday, June 28th, 2020 AT 10:23 PM
Tiny
TBARRY1989
  • MEMBER
It is a super crew cab. Yes, it looks like the image you posted in your last reply.
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Monday, June 29th, 2020 AT 5:57 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Okay, that makes a difference. The door ajar switch is integral in the door latch assembly. At this point, I suspect that the new latch assembly is faulty. Is the door closing tightly? This is a really simple set up. If you look at the attached pic, it shows power to the switch and the ground. If the circuit closes, it completes the circuit and the light comes on. So, either we have a bad switch or the door isn't closing fully.

I also found a recall dealing with the door that may be relevant. I don't know if this was already taken care of or not, but maybe the return spring in the handle isn't fully allowing the door to latch. Take a look through pic 2.

Joe
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Monday, June 29th, 2020 AT 8:25 PM

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