B212C M16 fuse burns. No special load module to use.

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ConorToot

Member
Joined
Jan 13, 2023
Posts
57
Reaction score
29
Location
Houston, Texas
Ram Year
2012
Engine
4.7L
So, my 2012 Ram 1500 SLT 4.7L flexfuel has been running freaking awesome since I rebuilt the brake system (everything but the booster to get rid of what was the ABS valve body), rebuilt the suspension system, removed the mechanical clutch fan and opted for an electric, replaced the intake with a cold air ram, added a throttle booster module, replaced the cooling system that won't leak every time it heats up, lowered the rear, and so much more, but then I start getting this B212C error, a light of a guy with a dodge ball in his face on the dash, and fuse M16 burns no matter what I do, and I'm going broke 1 10 ampere fuse at a time. I thought for some reason the battery might not be able to carry the load because it is two years old, but it wasn't some cheap, no name battery and I just trickle charged it up to 12.73 volts, replaced M16... again, and cranked it with my meter on it. It didn't drop below 10.5 volts when cranking, so I think it is okay.
In reading through the All-Data information, which I about half trust, they describe that I need a special adapter, which I priced at around $200. So, I'm not getting one of those. I took the TIPM out and probed between the cavities of M16 and found where the signal comes out. I'm confident that voltage gets through the TIPM from M16 to C6 pin 7. I also checked M32 on the same side cavity and it seems to go out in two places C6 pin 36 and pin 38. I could only find documentation on pin 38. Nothing is listed at all in All-Data for pin 36, but that doesn't mean it's a defect in the TIPM, it just means that it's not documented and I don't even know if it connects to a wire on the connector.
I also took the passenger seat and center seat out to check the SRS module. I reseated the connectors and checked for corrosion. Its my understanding that probing on the air bag system with a multi-meter is a risky pursuit, so I did my bets to minimize doing this as much as possible. Definitely, I didn't want to probe anything directly on the module, but I might disconnect the connector and ring out the wiring between the SRS module under the center front seat and C6 at the TIPM.
Have any of y'all had a B212C error code with an M16 fuse constantly burining?
If so, let me know what you did to fix it.
Thanks,

BTW, I work six days per week and twelve hour per day for Satan at a factory. Your suggestions are appreciated, but understand if I don't run out and try everything moments after you suggest it. Its 3:15 AM now and I'm just coming in from working on it and have to be back at work by 9:00 AM. The time I get to work on it is usually an hour or two from about 11:00 PM until 1:00 or 2:00 AM but I can't do that every night as I do everything in my home since its just me. I'll try the suggestions as soon as I can, but it might be a few days before I can get to it.
 
Last edited:

HarryS

Senior Member
Military
Joined
Jan 29, 2024
Posts
301
Reaction score
258
Location
Clovis NM
Ram Year
2014
Engine
Hemi 5.7
Likely, the code is coming on because the fuse is blown. I don't have a diagram for the 2012
 
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