Hey all, love the forum, should have joined months ago. I’ve had warning lights on for ABS and traction control for a while. I replaced a bad speed sensor to no avail. Changed the ABS control module. Only change now is that there is also a “service trailer brake system” warning in addition to the other two. Anyone have any ideas? Thanks!
Abs/traction control and now trailer brake. Please help
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153 Posts
Check for loose plugs are lose of power.
What faults are showing when you scan the abs module?
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153 Posts
Went to start my 2014 with the original batteries with morning (in heated garage). Got the service ABS, traction control, then the trailer brake followed by service throttle. Shut it off and checked the codes, low system voltage and loss of CAN BUS. Put 2 new batteries in it and all is well. Either your batteries are taking a dump, or you are losing communication with CAN BUS.
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14,690 Posts
Yes, need to scan the abs.
I would suspect a bad harness plug or a harness chaffed through and shorting a wire.
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556 Posts
Ironically mine thru the same codes after changing tire size with Alpha OBD. I had to reinitialize the ABS, took about 30 seconds.
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