Quote:
Originally Posted by SATBman
I don't seem to have a grasp of "how do I know when it's right". ... How did you find your sweet spot?
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Trailer all hooked up ready to tow. Deserted dry pavement. 20 MPH. Slam on the brakes as in an emergency stop. If the trailer brakes lock up, the gain setting is too high. If they don't lock up, the setting may not be high enough.
You want the gain setting as high as it will go without the trailer brakes locking up. It will probably take 4 or 5 test stops to dial it in. And you may need to change it depending on the load on the trailer. With my Ford OEM integrated trailer brake controller (ITBC), towing a 7x14' enclosed cargo trailer, I use a gain setting of 5 when the trailer is lightly loaded and 6 when loaded for bear.
But depending on tow vehicle and brake controller, your gain setting will probably different than mine. Way back when, with a different tow vehicle, trailer, and controller, I used a gain setting of 8. So load the trailer and tow vehicle ready for the road, then do the stopping tests to determine your best gain setting.
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Grumpy ole man with over 60 years towing experience. Now my heaviest trailer is a 7'x16' 5,000-pound flatbed utility trailer, my tow vehicle is a 2019 F-150 Lariat 3.5L EcoBoost SuperCab with Max Tow (1,904 pounds payload capacity).