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What Does P Mean On Hayes Engage Trailer Brake Controller  

Question:

what does the letter p mean?

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Expert Reply:

I checked the owner's manual for the Hayes Engage Trailer Brake Controller part # HA81760 and found this out for you about the "P" display.

The controller is factory pre-set to display mode P (% of maximum power)
• During braking conditions - the number displayed indicates the % of power being applied to the trailer
brakes.
• It is recommended that display mode P (or PH for a hydraulic actuator) be used while operating the
vehicle.

expert reply by:
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Conner L

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