ontariokeener
Junior Member
- Joined
- May 23, 2014
- Posts
- 8
- Reaction score
- 5
- Ram Year
- 2014
- Engine
- Hemi 5.7
2014 Ram 1500 hemi 4x4. I'm posting this in hopes it helps others diagnose this issue. My truck started randomly lighting up the dash like a Christmas tree - Service ABS/Service Trailer Brake system, and the truck wouldn't **** into 4wd at all. Turns out the solution was a new front drivers' side wheel bearing/hub assembly. Fixed all the issues. Turns out the bearing lets the hub get out of place and messes up the ABS sensor, which then disables the trailer tow and 4wd systems as they rely on wheel speed indication for the trailer sway control and 4wd engagement respectively. I see all kinds of questions on here with similar symptoms but no one discusses a wheel bearing as the culprit. As always YMMV.