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I believe these are the changes I made. It was a while ago, and my notes weren't as good then as they are now.
Unfortunately, it looks like this isn’t going to work with just AlfaOBD on the 2019-2020 1500s. The CBC Features Configuration Aux Switches PTO setting is what enables the aux switches to work, and even though the setting is successfully enabled in AlfaOBD, the BCM isn’t broadcasting it. The message would have to be spoofed. 2021 1500s with BCM hardware number 68496414Ax should be good.
So you are saying we'd need to figure out what would normally be sent to this device via LIN bus, in order enable and configure each switch?
I suppose you can do that, but yes, if you want the switches to work exactly like factory, you’d have to send out the programmed status of that message over linbus.
Not to derail, but were you successful taking these newer 21+ BCMs and uploading alfa logs? I thought I recalled you messing with one during the digital rearview mirror trials. Considering dropping the 200 to see if it fixes my tow mirror and rearview mirror software limitations.
I’d hold off on that one. A few members have tried this to get the DRVM to work by swapping in a 21 BCM, but it isn’t turning out to be as simple as swapping out the 4th gen BCMs. I just finished up messing around with another member’s 21 BCM on the bench, and he might try getting it swapped in again to see if it’ll work. This is a BCM that the dealer even tried restoring the vehicle configuration to, and the ignition just wouldn’t go into ACC or run. And now, recent updates to wiTECH software won’t even allow a vehicle restore to a mismatched BCM anymore, it has to be the same hardware number for the VIN.
