Yesterday morning one of my newer buses started randomly activating the red 8-ways (stop arm and crossing gate as well) while driving down the road. I disconnected the "red override" switch as well as the rotary entrance door switch and the problem continued. Not sure where to begin with this one. Vin on this unit is 4DRBUC8P9MB336350. Any ideas?
we had a 2021 IH with ID lamps coming on by themselves in the middle of the night, there was a new flash for the ESC , they did that and never happened again we had issues with the rotary door switch also( another unit, but 8 ways would not start) is there a switch above the door for activating and stopping the red pick up lights
OEM trained in wiring and all engine platforms for over 20 years
UPDATE: I suspected the BCM was the issue so I swapped BCM's with a sister bus to see if the problem stays with the vehicle or goes with the BCM. Unfortunately, swapping BCM's made the problem go away entirely. I'm guessing that the act of unplugging it and plugging it all back in reset something internally??? I talked to a guy at our dealership and he suggested updating the BCM. Using Diamond Logic Builder, I was able to reconfigure the software from version 332 to 371. I put this bus back on the route yesterday and haven't had any more issues so far. If it acts up again, this will be getting a new BCM.
8 way issues, 2021 International CE
Posted - 10/26/2021 : 05:16:04 AM
