2018 GD 310GK (Solitude). 2020 Chevy Silverado 3500. Using OEM brake controller. While driving approx. 55 mph and without touching brake pedal the trailer brakes locked up briefly (1 second or less). Caused a skid of 8 feet and threw a bunch of smoke. When we pulled over to investigate, the trailer brakes did not work.
Turned off truck, pulled and reinstalled 7-pin umbilical. Wiggled it around a bit. Started truck and noticed a diagnostic message saying traile brake connection was inoperative. Turned off truck, pulled and reinstalled umbilical and now truck diagnostic status reports brake connection is good.
Drove slowly to camp site, brakes working fine. Tried to measure voltages while pressing brake pedal and/or brake controller without much success, as discussed in other posts (due to complexities of ABS and whatnot). Will try again with trailer plugged in if I have a second 7-pin connector on bumper.
Inspected wires at each brake but did not observe any issues. When brake is applied I can hear buzzing from brakes. Inspected back side of truck bed 7-pin connector and it appears ok.
Inspected connections where trailer umbilical connects to trailer in junction box. All looks good.
The behavior of the lockup is similar to what would happen if the breakaway switch had activated. Inspection of these connections looks good and the plunger is intact. I've never tested this circuit as recommended elsewhere in these forums.
Wondering if this is the most likely culprit. Should I replace it? Have to drive home in a couple days (200 miles) so looking for quick responses.
Thanks.
Turned off truck, pulled and reinstalled 7-pin umbilical. Wiggled it around a bit. Started truck and noticed a diagnostic message saying traile brake connection was inoperative. Turned off truck, pulled and reinstalled umbilical and now truck diagnostic status reports brake connection is good.
Drove slowly to camp site, brakes working fine. Tried to measure voltages while pressing brake pedal and/or brake controller without much success, as discussed in other posts (due to complexities of ABS and whatnot). Will try again with trailer plugged in if I have a second 7-pin connector on bumper.
Inspected wires at each brake but did not observe any issues. When brake is applied I can hear buzzing from brakes. Inspected back side of truck bed 7-pin connector and it appears ok.
Inspected connections where trailer umbilical connects to trailer in junction box. All looks good.
The behavior of the lockup is similar to what would happen if the breakaway switch had activated. Inspection of these connections looks good and the plunger is intact. I've never tested this circuit as recommended elsewhere in these forums.
Wondering if this is the most likely culprit. Should I replace it? Have to drive home in a couple days (200 miles) so looking for quick responses.
Thanks.