service trailer brakes?

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Aug 15, 2015 | 9:09 AM

BigRed922

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service trailer brakes?

truck is giving me service trailer brakes. fuses all look good and so are hubs. abs light traction control lights are on. but they go away when its pouring rain. lmm dmax

Aug 15, 2015 | 10:04 AM

old dog

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did you check out the magnet's on the hub's of the trailer to see if they are getting worn through ? kinda weird doing it when wet unless it is shorting the magnet's when wet .

Aug 16, 2015 | 7:10 AM

BigRed922

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not sure what you mean. this is happening when i dont have a trailer hooked up. my abs, emergency brake, and traction control lights are all on. and it does it when its dry. the lights go off when its wet.

Aug 16, 2015 | 10:29 AM

old dog

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sorry it' beyond my understanding i thought the trailer was hooked up .they some time's act screwy when the magnets start to wear through

Aug 17, 2015 | 9:01 AM

BigRed922

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just got the code u0121 which is loss of communication to EBCM. where would i start looking?

Aug 17, 2015 | 11:05 AM

old dog

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there ,might be a bad connection on then harness coming from the electronic brake control module going back to the trailer plug at the bumper .

Aug 18, 2015 | 4:58 AM

BigRed922

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I started pulling plugs in the back by the bumper and they all seem good tho. Was thinking of regrounding the trucksame ebcm and then testing the lead to it. Just unsure how to test the lead