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Diode for Preventing Trailer 12 Volt Accessory Circuit From Backfeeding  

Updated 11/18/2020 | Published 11/16/2020

Question:

Wanting to add a battery in my cargo trailer, I want to draw off the charge 12v wire, but will I need to put any type of diode so not to back feed power to the vehicle is still plugged in? Thank you

1

Helpful Expert Reply:

If you wanted to prevent the 12 volt trailer wiring circuit from backfeeding when connected to your trailer's battery you'd have to use a diode like the part # RM-690. This will only allow the current to flow in one direction.

expert reply by:
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Jameson C
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