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Comparing Curt TriFlex Trailer Brake Controller To Curt Discovery Trailer Brake Controller.  

Published 04/14/2022

Question:

What is the difference between the Curt C51140 and the C51120..? Does the hardwire adapter plug C51515 come with either unit...? I Thanks

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Expert Reply:

The main difference is the Curt TriFlex Trailer Brake Controller # C24VV is a proportional brake controller while the Curt Discovery Trailer Brake Controller # C84VV is a time delay controller. The proportional controller will automatically adjust power sent to your trailer brakes based on how hard you are braking, while the time delay always sends the same force no matter how soft or hard you are braking.

Those with time delay controllers will often have to reach down to crank up the braking force when they are panic breaking where a proportional will do it automatically with no user input. The TriFlex can also be used with electric over hydraulic trailer brakes as the Discovery will only work on electric trailer brakes.

Both controllers are dash mounted are are capable of powering trailer brakes on 1-4 trailer axles.

Neither controller will include the Universal Wiring Adapter for Curt Trailer Brake Controllers # C51515 for connecting to your vehicle wiring.

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