Wheel Speed Sensors

[SwampFox73]

I have a 2009 Ram 1500 with the 5.7 Hemi. I am getting intermittent "ABS", "service traction control", and "Service 4wd" alerts. I have some Wheel Speed Sensors ordered and on the way, but today I was under the truck looking at them. I noticed some discoloration inside the plug of the front left sensor. it was a blueish color to be exact. During the summer months my truck gets driven pretty hard while pulling the camper and going off road at the river. The sensors get wet often.

Is the discoloration a sign of a bad plug? Is there a way to clean it out, other than air?

Any other info would be great. Thanks.