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Ran into a really strange issue I can’t seem to figure out. All started with the telescoping mirrors not wanting to retract. I assumed it was the “switch got wet and needed to dry out fix” since we’ve had some good rain here lately. Safe to say a couple of good dry days later and still no luck getting them to retract. So I figured with the warranty up I’ll see what I can figure out. So basically what I figured out was that I was not getting power to the retract pin at the mirror connector. Had power coming out of the switch but lost it somewhere before the connector at the mirror. Checked as many wiring diagrams and forum post that I could find and could not for the life of me find the right answer. So from what I had available to me I could see power went to and from the Driver Door Module. I never found switched power going in or coming out based on the wiring schematic, nor could I get continuity from the switch to either plug on the DDM. I was using a schematic based off a f150 thread I found. Anyways I ended up re pinning the connector swapping the ext and ret pins and got the mirrors to come in that way. So never really found the issue kinda assumed maybe a bad DDM. I was wrapping things up and getting things plugged back in and door panel back on. Went to plug the DDM back in like I’ve done 3-4 other times checking for power or continuity and got a “pop”. Not sure what happened but after that I lost all driver door functions no mirror adjust , windows, memory seat control, getting blind spot notification, cross traffic notification and air bag light is on. HVAC and radio acting weird too. Checked all the fuses I thought would be related all good. Hooked forscan up and have 5-6 controllers not reporting for loss of communication…tried to find a common fuse or breaker or something and I can’t find a common starting point to this circuit. Unhooked batteries for about 10-15 minutes too and that didn’t do anything, thought it might reset a driver or breaker in the bcm or pcm but no dice. Checked the plug by the spare tire for water no water but a little dirt.
Any Help appreciated TIA MS CAN modules not reporting when DDM is plugged
Error means not reporting
MS CAN modules not reporting when DDM is not plugged in
Last edited by Cmelde01; Mar 28, 2024 at 06:54 AM.
Ran into a really strange issue I can’t seem to figure out. All started with the telescoping mirrors not wanting to retract. I assumed it was the “switch got wet and needed to dry out fix” since we’ve had some good rain here lately. Safe to say a couple of good dry days later and still no luck getting them to retract. So I figured with the warranty up I’ll see what I can figure out. So basically what I figured out was that I was not getting power to the retract pin at the mirror connector. Had power coming out of the switch but lost it somewhere before the connector at the mirror. Checked as many wiring diagrams and forum post that I could find and could not for the life of me find the right answer. So from what I had available to me I could see power went to and from the Driver Door Module. I never found switched power going in or coming out based on the wiring schematic, nor could I get continuity from the switch to either plug on the DDM. I was using a schematic based off a f150 thread I found. Anyways I ended up re pinning the connector swapping the ext and ret pins and got the mirrors to come in that way. So never really found the issue kinda assumed maybe a bad DDM. I was wrapping things up and getting things plugged back in and door panel back on. Went to plug the DDM back in like I’ve done 3-4 other times checking for power or continuity and got a “pop”. Not sure what happened but after that I lost all driver door functions no mirror adjust , windows, memory seat control, getting blind spot notification, cross traffic notification and air bag light is on. HVAC and radio acting weird too. Checked all the fuses I thought would be related all good. Hooked forscan up and have 5-6 controllers not reporting for loss of communication…tried to find a common fuse or breaker or something and I can’t find a common starting point to this circuit. Unhooked batteries for about 10-15 minutes too and that didn’t do anything, thought it might reset a driver or breaker in the bcm or pcm but no dice. Checked the plug by the spare tire for water no water but a little dirt.
Any Help appreciated TIA
Check under the hood in that fuse box?
you said you repinned the harness, did you put it back to factory before plugging it in?
what model, cab size and trim level do you have?
hopefully someone with a schematic can advise where a fuse for all this is located, or if you possible lost a module.
you said you repinned the harness, did you put it back to factory before plugging it in?
what model, cab size and trim level do you have?
hopefully someone with a schematic can advise where a fuse for all this is located, or if you possible lost a module.
I updated the post with that info and some pictures of the modules not reporting. I checked the fuses I thought would be associated with something but that’s not to say that wiper motor fuse isn’t tied into a can controller some how (which I’ve seen ) I/e but I haven’t found a schematic that’s shows how it’s all tied together
Strange as it sounds I had the plug up near the spare tire have water intrusion on a new 2017 and it caused all kinds of havoc with driver side window, radio and HVAC controls.
Dealer replaced the plug under warranty and problems never returned.
As far as your original issue, how are your batteries? If original from 21 they’re probably due. That will cause things to start shutting down, and could even cause some of the problems you have now. Granted, hearing a “pop” doesn’t sound good.
I had very similar issues with my truck a few years ago. After half a day testing the mechanic found a bad connection in one of the plugs in the dash harness on the drivers side. I don’t remember if the wire was broken or the pin was bad but it was a simple fix once he found it. Maybe something with the work you did on the connection.
Strange as it sounds I had the plug up near the spare tire have water intrusion on a new 2017 and it caused all kinds of havoc with driver side window, radio and HVAC controls.
Dealer replaced the plug under warranty and problems never returned.
So I checked what I think was the right plug I think it’s a 24 pin whitish grey plug back by the spare tire. I didn’t find any water just dirt and dust
As far as your original issue, how are your batteries? If original from 21 they’re probably due. That will cause things to start shutting down, and could even cause some of the problems you have now. Granted, hearing a “pop” doesn’t sound good.
I had very similar issues with my truck a few years ago. After half a day testing the mechanic found a bad connection in one of the plugs in the dash harness on the drivers side. I don’t remember if the wire was broken or the pin was bad but it was a simple fix once he found it. Maybe something with the work you did on the connection.
So they defiantly could be getting weak because they did get low on me trying to clean the sunroof tracks and drains but I just hooked my cables up and got it started and let it charge for awhile next morning cranked up fine drove around that day. Now when I started doing this testing for the mirrors I made sure to start the pickup a couple times while testing to keep voltage up. As far as the pinning in the harness goes I’m pretty sure everything is good I got the auditable click from the pin seating and I did a pull test to make sure and they were good. The other thing throwing me for a loop is why did it not pop a fuse before this happened? From what I see everything is a protected circuit in this area.
So I checked what I think was the right plug I think it’s a 24 pin whitish grey plug back by the spare tire. I didn’t find any water just dirt and dust
For the module errors, the DDM has the MS-CAN bus running to it, since the DDM died, it’s also crashing the CAN bus when plugged in and no other modules on the MS-CAN bus can communicate with each other or the other CAN busses in the truck.
Your going to have to get a new DDM before you can continue, based off your description above.
Try unplugging the DDM to see if all the communication errors clear. But I also think you need a new DDM. It was probably the reason why your mirrors weren't working.
The DDM will need as built data (programming). Use Forscan to load the data if the module is new ( get the data from the Motorcraft website and your vin....it's a process but not too difficult). If you get a used module from a exactly equipped truck and model year, it may plug and play.
For the module errors, the DDM has the MS-CAN bus running to it, since the DDM died, it’s also crashing the CAN bus when plugged in and no other modules on the MS-CAN bus can communicate with each other or the other CAN busses in the truck.
Your going to have to get a new DDM before you can continue, based off your description above.
kind of my assumption but thank you for the clarification
Try unplugging the DDM to see if all the communication errors clear. But I also think you need a new DDM. It was probably the reason why your mirrors weren't working.
The DDM will need as built data (programming). Use Forscan to load the data if the module is new ( get the data from the Motorcraft website and your vin....it's a process but not too difficult). If you get a used module from a exactly equipped truck and model year, it may plug and play.
So I’ve done a few forscan mods to it in the past. Should I be able to plug the new ddm in and just program my last saved file?
Got it all put back together and new ddm programmed. Everything is back to square one still no power to retract pin. My guess is the unserviceable relay on the BJB. Any updated info on this greatly appreciated!
