Brake Controller / Dexter EOH Actuator Does not Work / Glitchy

jjackkrash · June 15, 2020

I just hooked up a new Riverstone 5er with electric over hydraulic disc brakes with a Dexter actuator. It works for a second and then throws error messages (service trailer brake system, trailer disconnected, etc.) then the brakes don't work at all. I think based on some internet research and the NHTSA Bulletin (linked below) that a HydraStar EOH actuator adaptor module will fix the problem (and I've ordered it), but I've also noticed that the brake controller is glitchy with all my trailers, won't remember gain settings, and sometimes throws error messages for no apparent reason on my flatbed and dump trailer as well.

https://static.nhtsa.gov/odi/tsbs/2020/MC-10173714-9999.pdf

Anyone else having any issues? Are there any software updates on the way? So far the integrated controller and the trailering system is disappointingly glitchy.

jjackkrash · June 15, 2020

The good news is I didn't have any significant problem stopping an 18-19k fiver coming off freeway speeds with no trailer brakes, other than it felt a little sluggish stopping.

TripDad · June 18, 2020

I have been having brake controller issues since day 1. Two different trailers. Service advisor says ITBM is very sensitive and GM recommends using a Pollak brand 7 pin connector. I have one on order and will report back. Mean while I have the "Service Trailer Brake System" message now. Fun times.

jjackkrash · June 19, 2020

The adaptor listed in the service bulletin fixed my issue (at least for now). I have one of the specific Dexter actuators listed. Now it appears to work perfectly. Install was easy, splice and solder two wires and fasten adapter to rig next to actuator.

Edited June 19, 2020 by jjackkrash