My headlights /taillights,turns ,inside lights ,radio,windows and door locks wont work
dash has traction control and break light on
No engine light and third break light and reverse light work

Any help ? Ov checked all fuses and for broken wires

 

Everything you list that doesn't work passes through the "Smart Junction Box" (SJB). The SJB is the fuse box near the driver's leg. It performs a lot more duties than just a fuse box.

The high mounted brake light and reverse light circuits do not pass through the SJB.

I'm not saying the SJB is bad. This is simply an observation.

I assume your fuse check was done with a voltmeter so you know you have power to the SJB.

Most of the SJB power comes through a single fusible link. In case you've lost power to the SJB, I've attached the location of that fusible link (between splices S113 & S114).

You may also want to check the main ground connection for the SJB at G205 (location below).

 

thank you i will check that link, the ground is good i checked it when I was down with the fuses , the Wipers.and horn still work which also come out of that box even if the fuse box is bad would it still make some of the functions work

 

The horn doesn't go thru the SJB. For the wiper, the power for the wiper relay is from the SJB but all of the smarts are in the wiper motor which is supplied from the BJB (under the hood).

I imagine some of the functions in the SJB could work and others not work.

I forgot to ask: Does the engine start and run?

Can you put the truck in gear (i.e., does the shift solenoid that lets you take it out of Park work)?

 

Yes I actually drove it home about an hour afterwords and it worked fine other than what I listed

 

It does seem like some of the electronics in the SJB have stopped working. I'm afraid I don't have any additional suggestions.

btw... you were correct about the horn relay being in the SJB. The horn relay is in the BJB only for stripped chassis.

Best of luck and let us know how it works out.

 

I have a 2010 e350 with all the identical issues.

Mine has a brand new motor installed from ford maybe 10-15,000km on it—runs, drives good, only has reverse lights, cluster works. Displays all the same as OP said, I’ve tested every single fuse in the SJB(check out fine). I have No power to the locks, no power to the windows, no blinkers, no hazards, no tail lights or headlights. I tested random plugs into and out of sjb, checking for power with key on aswell as off.

my instinct tells me somewhere a main feed from that sjb out to the accessory’s has an open circuit. Is there any grounds after sjb towards accessory’s to check, or main plug. I’m trying to pin point the point of power loss. Driving me nuts lol

 

Here's another location drawing of a main ground for the SJB (G203).

The multiple wires from the SJB to the ground connection tie together at splice S239 (shown in the drawing just above G203).

Those grounds connect to the SJB through several pins on C2280D (connector face drawing attached).

 

thank you,

my next question, would i be able to pull the sjb if everything checks out ground wise. And open it to see if a broken pin/connector on route to exit, or are there little circuit boards inside of the sjb so the issue may not be so obv.

thanks

 

any update ?

 

first im going to apologize for the poor spelling, using my laptop to type this out..I thought that i would give a little update with the strange event that took place regarding the issue of this thread. so long story short, my van issue still isnt resolved and has sat parked since ive chimed into this thread.. well my ford expedition daily driver fuel pump died, so in the meantime to buzz around town ive been using the van. maybe about a week and a half now.
Last night, i noticed a strange loud humming sound and i looked outside to the interior lights, brake lights, license plate light, flashing, radio was full blast. i went out there to see what the hell was going on, thinking someone tried breaking into it or something, and i stuck the key in the ignition, and couldnt get any reponse while trying to start it. when i turned the key off then back on i was able to start it. i instantly had, working radio, working headlights, highbeams, brake lights, power windows, everything that wasnt working before was now working.. for about 3 mins, then i heard a relay click, i lost everything again, and about a minute later it came back working again. i left it running for about 15 mins, enjoying everything working. so i shut it off, fired it back up quickly and everything was still working. so i shut it off then go to lock the doors, and now my brake lights are stuck on.. i checked the brake switch, even unplugged it, and the brake lights would not go off. i ended up pulling the fuse for the night and this helped. Anyways i go back out this morning and nothing works again... but for some reason, even with the brake light fuse out and yes i know it was the right fuse. i still have brake lights (as they should work with the peddle) but everything else that was effected before is not working again... i know that the SJB has unserviceable relays built in, could the relay be working intermediatly? mind of its own or should i start considering i have a bad wire somewhere... ive already searched this thing for days when i bought it trying to diagnose this... but after whats happened, im wondering if maybe the SJB is okay but theres a bad contact somewhere or loose pin somewhere. i did try fiddling with the harnesses while running with no luck aswell hoping to wiggle or help narrow down the problem... with all this said, would anyone have any suggestions or opinions. Thanks

 

Some clarification, please...
When the various lights were flashing, were they all flashing in unison? Was the flashing random and fast or at regular intervals like the turn signal flasher?

When the brake lights were stuck on was the high mounted brake light on? What about the front turn signals? Because the low brake lights also function as turn signals, they are wired differently than the high mounted brake light (any time the brake lights act up check whether the high brake light is or is not affected). Checking the front turn signals determines if it's actually the brake lights or the hazard lights that were stuck on.

There are so many separate systems involved in your issues that it may be a power feed (although that probably wouldn't explain the "stuck on" issue). Once I get answers to the above I'll look to see what, if anything, these various systems have in common.

 

Yes everything outside including the interior dome light, dash light were flashing together, as well as the blower motor(because in on postion) was on off on off with the lights flashing.. basically it was like a power to everything then power to nothing, very quickly, the radio was just loud and static(from the station it was on)... one thing ill mention, i did tie my brake lights into the 3rd brake light only to get me by and make it a little safer while i have to drive it, and this was working fine for the past week or so, one thing that didnt work when all functions were working during this, was the turn signals/hazards, but my thought is because i jumped the 3rd brake light power to the running brake lights.. ill mention i did not disconnect the wire from the driving brake lights from the harness, i simply just spliced into it from the 3rd brake light. again this was just to make it a little safer to get around town. so doing so i would assume wouldnt allow my blinkers and hazards to work.. everything on my multifunction switch all the time works... as in wipers, sprayer, etc. aside from hazards and blinkers but again, my assumption is because of how i tied into the brake lights. i do have a video of the event, not sure how to send it.. thanks for the reply

 

I'd disconnect the battery positive and then remove and clean the large bolted lug on the Battery Junction Box (the fuse box under the hood). While the BJB feeder is off, trace that wire away from the BJB. There should be a splice which powers a main feed into the SJB which you could also check.