Interior lights issue?

JVILLEGAS0919

MEMBER
2012 LINCOLN NAVIGATOR
5.4L
V8
2WD
AUTOMATIC
180,000 MILES

My interior lights will only come on when either of the doors open. But if we try to turn the light individually it will not turn on. Also, when either door is opened and we click on any light, the light immediately turns off.

Thursday, December 22nd, 2022 AT 8:38 PM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,909 POSTS

This happens when the SJB (smart junction box) goes out, but to be sure we should do a CAN scan which is easy. You can get a CAN scanner (Controller Area Network) from Amazon from about $32.00.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Amazon CAN scanner link:

https://amzn.to/3sX8MCX

Here are the interior wiring diagrams so you can see how the system works and how to change out the SJB as well. Check out the images (below). Please let us know what happens.

Images (Click to make bigger)

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Friday, December 23rd, 2022 AT 11:57 AM

JVILLEGAS0919

MEMBER
3 POSTS

Thank you so much. I have a scanner at home that connects to my laptop. I’ll look at the video and check it out. I’ll follow up. Thank you again and Happy Holidays.

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Friday, December 23rd, 2022 AT 1:43 PM

KEN L