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Thread: Service trailer brake system
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03-14-2019, 10:03 PM #1
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Service trailer brake system
Tow vehicle is a 2016 2500 HD. Today the “SERVICE TRAILER BRAKE SYSTEM” message came on. Trailer was not hooked up. Has this happened to anyone?
2019 Reflection 303 RLS
2016 Silverado 2500 4x4 Gasser
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03-14-2019, 10:41 PM #2
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Yes - happened to us multiple times. Sometimes weeks apart. Sometimes minutes apart.
I assumed a wiring issue, checked and checked. Never found anything
Finally took it to my dealer, they read the fault codes and replaced the module in the dash.Colan and Marilyn Arnold
Des Moines, IA - kind of, on the road full time.
Currently in Durango, Colorado
Momentum 350M originally, now a 397TH
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03-14-2019, 10:44 PM #3
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03-14-2019, 10:52 PM #4
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For us the message never occurred with the trailer connected and brakes always worked.
I purposely set the gain a little high, that way I KNOW and can feel the trailer braking.Colan and Marilyn Arnold
Des Moines, IA - kind of, on the road full time.
Currently in Durango, Colorado
Momentum 350M originally, now a 397TH
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03-15-2019, 06:21 AM #5
This happened once last year while towing. When home, and without the trailer, it still did it. Took it to dealer and found no code errors and noted it for the file. There were no TSB's on this. With and without the trailer, operated normal. Has not done it since. I think we posted this last year here and also had a few responses.....but no real answers. So we wait for the next gremlin!
2016 GMC 2500 HD Denali Crew Cab 4x4 Duramax
2017 Reflection 303 RLS #13156 3/2017
B & W turnover ball with Andersen Ultimate
Disc Brakes
TireTraker TT-505 tpms
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03-15-2019, 08:14 AM #6
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There have been issues with the dash slide switch sending a low signal to the module. If module sees signal for 30 seconds will trigger alert and disable manual slider. Brakes are supposed to continue normal operation using foot brake .
This fault can occur without trailer connected.Vickie & Charlie
2019 310GK-R
2020 RAM Longhorn DRW Cummins /Aisin
310GK Bounce When Towing
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