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Meaning of .C. Display on Tekonsha Primus Brake Controller  

Question:

Brake controller My brake controller screen just got a.C.on it and I’m not sure what that is

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Expert Reply:

The .C. you're seeing on the display of your Tekonsha # TK90160 Primus Brake Controller indicates that there's a trailer connected and that the boost feature is turned on. To turn off the boost setting, press the boost button located above the LED display a few time until the decimal point after the C goes disappears.

If your trailer isn't plugged in, and you're seeing that display the most likely culprit is a dirty or corroded trailer connector on the vehicle side.

expert reply by:
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Mike L

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