Is There A Wiring Schematic Diagram For Pre-Wired Switch Box 3376391104 For 12V Circuits In Vehicle?

Updated 10/05/2026 | Published 10/03/2026

Question:

Is there a schematic for this box?

asked by: Scott

Expert Reply:

Hey Scott, there sure is.

I've attached a couple photos to show you the wiring schematic for the Buyers Products Pre-Wired Switch Box w/ Relay and Circuit Breaker # 3376391104. Basically, you'll run the 2 10 gauge Red wires to battery positive, the main black wire to ground, then the smaller 16 gauge red wire to ignition (or a circuit that gets power when the ignition is on).

Then the other wires have their own specific circuits for loads, such as lights, 12v pump, winch, etc. There is 1 higher output circuit rated at 40 amp, while the other 3 are rated for 30 amp.

What are you trying to power off of it Scott?

expert reply by: Andrew N