Skip the auto shop - Our mechanics make house calls

Q: Rear door latch switches disabled? How to re-enable?

asked by on

Hello-

I just bought a '14 F-150 SCrew. When I open either of the rear doors, the interior lights do not come on, and the door ajar alarm does not go off (if the truck is in ACC/running). I thought the previous owner might have jumpered the appropriate lines on the latches/switches for the rear doors to make them always appear shut, but I just pulled the door panel and ohmed out those lines at the latch pigtail (harness side), and they aren't shorted together. Also, I've got a scan tool that can monitor PIDs, and the rear doors always show as 'closed', even when actually open.

Do you have any ideas why this might be the case, and how I can re-enable those door switches?

Thank you!

My car has 42000 miles.
My car has an automatic transmission.

A: The rear door ajar switches are parts of th...

The rear door ajar switches are parts of the latch in the doors. There is no on or off switch to disable them. The problem is most likely caused from the ajar switch switches inside both latches are stuck in the closed door position. This means the switch is stuck open and not completing contact to ground signaling the body control module that the door is open. This is why the PID does not signal the door is open and turn on the light for you. You will need to replace the door latches if you want the doors to work the interior lights. You should contact a mechanic like one from YourMechanic to come and verify the latches are bad and replace latches

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: I have a 2002 Ford Escape brake light comes on while driving once I turn of the car the brake lights turns off . Today I try to

The red brake light can only be illuminated for three reasons. One of these reasons will only occur on certain vehicles. The main two reasons are low brake fluid level which you verified to be full, and the parking brake...

Q: Could the Traction Control System (TCS) lock your wheels?

Hi there. Your vehicle is designed to haul lots of weight and a trailer behind it. The noise could be from the traction control system (TCS) activating when in a turn. If a wheel speed sensor is not functioning correctly,...

Q: Engine bogs down going uphill

Considering the age of your vehicle, I would suspect the catalytic converter might be having issues. Catalytic converters are an emission component that are located on your exhaust pipe. Over time, the insides of the converter start to fail and...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.