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Does 12 Volt Accessory Circuit of Trailer 7-Way Wiring Have Fuse Protection  

Updated 05/14/2025 | Published 05/26/2020

Question:

does the back 12v wire to the trailer have a fuse?

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Expert Reply:

Yes there will be a fuse that protects the 12 volt trailer accessory circuit of your 7-way wiring. If this is factory wiring of a truck you'll want to check out the fuse box diagram or the owners manual.

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Jameson C
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Reginald profile picture

Reginald

5/14/2025

Where would the 12 volt fuse be located

Jameson C. profile picture
Etrailer Expert

Jameson C.

5/14/2025

@Reginald Depends on the vehicle but in the fuse box there should be a fuse/circuit labeled 12 volt accessory.

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