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Old 09-11-2019, 04:49 AM
dzimbric's Avatar
dzimbric dzimbric is offline
Join Date: Oct 2015
Location: Shallotte, NC
Posts: 61

Default Trailer Brake & Parking assist fault

I keep getting a Trailer Brake Service fault, intermittently the fault clears and the brakes work. It’s really annoying when towing weight. I have replaced the brake control relay and the tail light circuit board and cleaned the connectors.
Is there another connector between the controller on the dash and the brake relay.
It happens with all of my trailers and even shows when no trailer is connected. I also have had the “Service Park Assist” fault for awhile but just ignore because I am normally pulling a trailer.

Any advice is appreciated.

2008 K2500HD CC/SB
7-9 inch Cognito Lift, Cold Air Intake. 4 inch exhaust, dsp5 tune by Diesel Addiction (Thanks Dustin), 35" Michelin Defenders on 20 Inch Ultra Spline Rims

'56 C6500 w/tilt
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