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What Does NC on Primus IQ Brake Controller Mean When Starting Vehicle and Then Disappearing?  

Question:

Brake controller shows NC when starting vehicle then goes blank. Pushing button used to show something. What the code nc?TK90160

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Expert Reply:

The NC on your Tekonsha Primus IQ Brake Controller # TK90160 is simply showing power to the brake controller without a trailer connected. It should do this and display for a 15 seconds before going away. The NC means the brake controller is seeing no trailer connection.

The button being pushed should not show anything when a trailer isn't connected. When a trailer is connected it would give you a power output range between 0.0 volts and 13 volts. I've attached a photo of part of the owners manual and have attached the complete manual labeled installation details to assist.

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Jason S
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