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How To Find The Correct Wire To Connect To On Brake Switch For Installing Trailer Brake Controller  

Question:

How do you test the input of the brake light switch to the brake controller?

0

Expert Reply:

A Test Light # PTW2993 will allow you to probe the wires on a brake light switch. This will help you to identify which wire only shows power when the brake pedal is pressed. Then you will be able to connect to the red wire on your Brake Controller # 90885.

expert reply by:
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Bud M

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