Below is a listing of commonly asked questions and answers for the Activator® IV Trailer Brake Controller, Timed, 1 to 4 Axles. If you can't find the
information you need here, please submit your question to us using the form in our contact page.
Select a question to view the answer.
My brake control unit is displaying Er, what does this mean?
There is an internal error within the brake control unit itself. There's typically no fix for this type of condition. If unit is still under warranty the unit can possibly be returned to where purchased or contact us directly @ 800.632.3290.. When calling have your receipt of purchase available to provide, along with serial # on bottom side of brake control unit. This is typically a blue or white decal.