Smart Juncton box
All my door locks stopped working in my 2008 F250 Crew Fx4. Locks do not work from driver or pass. door, key fob, or door keyless pad. When you hit any of the switches you can hear a relay type sound in the SJB.
There was some sort of failure because we could smell it. But I am not sure if it was the SJB that failed or a wire between the SJB and the lock motors.
Does anyone have a wiring diagram for the door lock circuit? And/or know how to troubleshoot to find the bad wire or if it is the SJB that failed.
Last edited by Parklife1977; Oct 7, 2016 at 09:08 PM. Reason: Other message
Just like with mich800 I smelled something strange but thought it might be something outside when it happened but smelled electrical burning. Right after that I discovered the door locks stopped working. So my issue is the door locks do not work no matter if I use the key fob, door switches or keyless entry pad.
When the truck is off you can here a light click in the SJB. If you press the door unlock button fast enough while the truck is off the radio comes on, and while the radio is on if you pull up on the window switch the doors unlock, but if you push down the window rolls down (but you have to be pushing the unlock button simultaneously).
I have fords diagnostic flow chart written in fordinese. That really netted me nothing except going back to the SJB.
All my door locks stopped working in my 2008 F250 Crew Fx4. Locks do not work from driver or pass. door, key fob, or door keyless pad. When you hit any of the switches you can hear a relay type sound in the SJB.
There was some sort of failure because we could smell it. But I am not sure if it was the SJB that failed or a wire between the SJB and the lock motors.
Does anyone have a wiring diagram for the door lock circuit? And/or know how to troubleshoot to find the bad wire or if it is the SJB that failed.








