Stangman570
Well-Known Member
- Joined
- May 31, 2019
- Threads
- 21
- Messages
- 405
- Reaction score
- 1,028
- Location
- Florida Panhandle
- Vehicle(s)
- 2019 Ford Ranger 4x4 XLT Sport
- Thread starter
- #1
Apologies for the long post.
Driving around last night I got a Cross traffic and Blind spot system fault. Shortly followed by intermittent air bag fault illumination and the lights on lower control panel for the air turning on and off randomly. I pulled over and turned off the truck and restarted. Problem remained for the duration of my twenty mile trip. Contant faults for the blis and cross traffic and intermittent airbag and lights to the lower panel continued to randomly turn on and off. Also noted that the air controls were also unavailable on the touch screen.They were there but inop. In addition, I noticed that the in cab turn signal indicators rapidly flashed each time I used the left or right blinkers. It was too late for troubleshooting by the time we got back.
This morning I found my passenger side rear tail light assembly with about 1/4 cup of water in it. Removed the entire assembly and removed the blis radar module. Drained all the water out and purged the tail light assembly for about 8 hrs with an old hair dryer with no heat. Ensured all of the moisture had been removed. Found and repaired a small crack on the upper part of the lense.
Removed the rear cover on the radar module and found zero moisture inside, although I did find what appeared to be corrosion on a couple of pins on the module. Cleaned the pins and connector on the module and the wire harness to the tail light assembly. Reinstalled everything, but this didn't clear the fault. No codes were found with my BDX. I've performed the blis reset procedure by turning the ignition off and on twice. This didn't work, I pulled the negative to the battery for about 5 mins while I was checking other things. Doing this hard reset didn't work either. Confirmed that the battery was at full charge, so this part is ruled out.
I thought perhaps the radar module was bad from the exposure, so I swapped it out with the left side that has no faults. I expected the fault to move to the drivers side, but that didn't happen. The fault remained on the passenger side. I tested the original radar module that is now in the drivers side assembly by having my wife drive her truck next to mine. The drivers side blis functions as it should via the drivers side mirror indication. So I know for a fact that that module is good, although it was exposed to moisture.
I went further by completely disconnecting both tail light harnesses on each assembly simultaneously and then turning the key to on. The drivers side mirror LED never came on as expected however, the passenger side mirror LED instantly came on even though both tail light assemblies were disconnected from the truck. Pluging in the drivers side tail light assembly (with original passenger side module installed) and turning the ignition key to on, the drivers side Blis turns on briefly and turns off as it should after testing successfully.
At this point it would appear as though the harness leading to the passenger side assembly might have been compromised. I disconnected and cleaned the connector just to the right of the spare tire on the passenger side. I ohmed out pin for pin this part of the pig tail cable that goes up to the lamp assembly and found no issues. I followed the harness all the way to the mid point connector just in front of the fuel cell on the drivers side and found no issues with breaks or chaffing. Inspected the remainder of the harness to the engine bay and found no issue there either.
I guess it's time for me to pickup a OBD Forscan connector on Amazon so I can get busy checking the SDOR and see if it needs to be reset? On a side note after removing all the water/moisture from the passenger assembly, the random airbag illumination, air control panel issue, and rapid in cab turn signal indicators was resolved.
Driving around last night I got a Cross traffic and Blind spot system fault. Shortly followed by intermittent air bag fault illumination and the lights on lower control panel for the air turning on and off randomly. I pulled over and turned off the truck and restarted. Problem remained for the duration of my twenty mile trip. Contant faults for the blis and cross traffic and intermittent airbag and lights to the lower panel continued to randomly turn on and off. Also noted that the air controls were also unavailable on the touch screen.They were there but inop. In addition, I noticed that the in cab turn signal indicators rapidly flashed each time I used the left or right blinkers. It was too late for troubleshooting by the time we got back.
This morning I found my passenger side rear tail light assembly with about 1/4 cup of water in it. Removed the entire assembly and removed the blis radar module. Drained all the water out and purged the tail light assembly for about 8 hrs with an old hair dryer with no heat. Ensured all of the moisture had been removed. Found and repaired a small crack on the upper part of the lense.
Removed the rear cover on the radar module and found zero moisture inside, although I did find what appeared to be corrosion on a couple of pins on the module. Cleaned the pins and connector on the module and the wire harness to the tail light assembly. Reinstalled everything, but this didn't clear the fault. No codes were found with my BDX. I've performed the blis reset procedure by turning the ignition off and on twice. This didn't work, I pulled the negative to the battery for about 5 mins while I was checking other things. Doing this hard reset didn't work either. Confirmed that the battery was at full charge, so this part is ruled out.
I thought perhaps the radar module was bad from the exposure, so I swapped it out with the left side that has no faults. I expected the fault to move to the drivers side, but that didn't happen. The fault remained on the passenger side. I tested the original radar module that is now in the drivers side assembly by having my wife drive her truck next to mine. The drivers side blis functions as it should via the drivers side mirror indication. So I know for a fact that that module is good, although it was exposed to moisture.
I went further by completely disconnecting both tail light harnesses on each assembly simultaneously and then turning the key to on. The drivers side mirror LED never came on as expected however, the passenger side mirror LED instantly came on even though both tail light assemblies were disconnected from the truck. Pluging in the drivers side tail light assembly (with original passenger side module installed) and turning the ignition key to on, the drivers side Blis turns on briefly and turns off as it should after testing successfully.
At this point it would appear as though the harness leading to the passenger side assembly might have been compromised. I disconnected and cleaned the connector just to the right of the spare tire on the passenger side. I ohmed out pin for pin this part of the pig tail cable that goes up to the lamp assembly and found no issues. I followed the harness all the way to the mid point connector just in front of the fuel cell on the drivers side and found no issues with breaks or chaffing. Inspected the remainder of the harness to the engine bay and found no issue there either.
I guess it's time for me to pickup a OBD Forscan connector on Amazon so I can get busy checking the SDOR and see if it needs to be reset? On a side note after removing all the water/moisture from the passenger assembly, the random airbag illumination, air control panel issue, and rapid in cab turn signal indicators was resolved.
Sponsored
Last edited: