ABS light comes on after a while in wet only

[Driftin]

What could be causing this? I went through my abs system on my IX pretty thoroughly and got the system to where it works great.
Except in snowy conditions. I have a 26 mile commute, and over the last couple of months, I have noticed that on snowy days, the ABS light will come on when I am nearing the office. It works great the whole ride in, but for some reason, the light has been coming on after 20+ miles. I have noticed it in just wet weather, but more often and consistently when the roads are snowy and slushy. I am thinking that it must be dirt and grime getting into the abs rings as a result of snow.
Otherwise in the dry, it works great, and most of the way in it works great. This has me scratching my head.
What are your thoughts?

[jlevie]

My suspicion, since snowy or wet conditions cause the warning, would be moisture affected one or more wheel sped sensors. Probably failing insulation on the sensor wires.

[Driftin]

That could be. I'm redoing the brakes on the car this weekend hopefully, so I will check insulation carefully. I would think though that that would be the case after 1 mile in the snow, not the whole way down the canyon, and then finally coming on. Weird.

[ELVA164]

That could be. I'm redoing the brakes on the car this weekend hopefully, so I will check insulation carefully. I would think though that that would be the case after 1 mile in the snow, not the whole way down the canyon, and then finally coming on. Weird.

Depending on the size of the abrasion/cut/break in the insulation and its location, it might take a while for a sufficient amount of moisture to get in there.