Thread Tools Display Modes
Old 01-29-2012, 08:37 AM   #1
Senior Member
chuck9997's Avatar
Join Date: Jun 2011
Location: Clinton, Tennessee
Posts: 288
PRODIGY P3 brake controller set up

Thanks for any assistance.

I have a Prodigy P3 brake controller. Used it when I had a small JAYCO TT. Didn't tow anything last summer.. now I have bought a newer camper and getting ready to put the P3 back in my truck.

I have read, and am familiar with.. the installation and setting process. I have never been really sure what the term "lock up" means when setting the controller. The instructions say initial set the controller at "6". Run 25mph.. use the manual slide to brake. If the trailer brakes "lock up".. adjust. Ideal setting is just before "lock up."

My question.. what do they mean by "lock up"? A screeching, squealing smoking brake lock up.. or what? How do you tell when the brakes "lock up" .. by PRODIGY's definition of "lock up."

chuck9997 is offline   Reply With Quote
Old 01-29-2012, 09:04 AM   #2
carbonman's Avatar
Join Date: Apr 2011
Posts: 43
Lockup means your trailer wheels will stop turning while the you are still moving and leave skid marks. At 25 mph when you fully engage the manual trailer breaks you should feel a good straight tug from the trailer without it's wheels skidding.

carbonman is offline   Reply With Quote
Old 01-29-2012, 09:24 AM   #3
Moderator Emeritus
Triguy's Avatar
Join Date: Aug 2010
Location: Southeast Wisconsin
Posts: 6,953
Typically, the 25mph setup means that the trailer brakes actually stops the trailer tires from moving, causing them to skid and giving off the screech and squeal you might expect. The whole setup will lurch to a stop. You back down from there.

But, I have had a trailer that never squealed to that extent so "lock up" can vary depending on your trailer and the brakes. It also can depend on how new the trailer brakes are as I understand it and how warmed up they are for the test.

I look to obtain a noticeable braking action from the trailer while the whole setup stops simultaneously and smoothly. When I have completed the 25mph test successfully, the manual lever slows down the trailer and TV smoothly and reasonably quickly without jerking.

The goal is to get a smooth uniform stopping action with the trailer and truck brakes working in conjunction.
DW, 3 Kids and our Goldens

2012 Shamrock 233S
2008 Toyota Sequoia 5.7L 4WD
Triguy is offline   Reply With Quote

brake control, brakes

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Virginia Campgrounds

Reviews provided by is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 09:11 PM.