bad ground will do it.

If your scanner can't read the abs module you won't be able to solve this problem. You said you get no codes but that’s impossible if you have trifecta your scanner must be missing something.

Can you read real-time wheel speeds and transmission input and output speeds? Any of those sensors not reading and you will have trifecta.

What color is BRAKE ? If RED, than it's a whole different ball game.

When you swapped the abs module was it the exact same model number? I've read that if not, it needs to be coded to the car.

Back to: need a scanner that can read the wheel speeds and transmission in/out. I use the foxwell NT510 and it's served me very well. Cant code much but can do some module programming.

Oh: the other biggies that will set trifecta: steering angle sensor and yaw sensor. Any of those will show up on the foxwell. Can you read the SAS with your scanner?

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)