Big 3 Wiring Installation Instructions

Big 3 Wiring Instructions

Big 3 Wiring

The big 3 Wiring upgrade is an ADDITION to your factory wiring.
All factory connections need to remain connected.
For protection it is recommended to add an in line fuse to the positive wire. All grounds must be cleaned to bear metal and properly secured.

Positive 1/0 100% Pure Copper Cable

Connect from the positive stud on the alternator to the positive on the battery

Ground 1/0 100% Pure Copper Cable

Connect from alternator mount bolt to frame/chassis

Ground 1/0 100% Pure Copper Cable

Connect from negative on battery to the frame/chassis

Big 3 Wiring Kit With RVC

The big 3 Wiring upgrade is an ADDITION to your factory wiring.
All factory connections need to remain connected.
For protection it is recommended to add an in line fuse to the positive wire.
All grounds must be cleaned to bear metal and properly secured.
RVC vehicles have a GROUND SENSOR LOOP in which the ground wire will need to be ran through this loop for proper performance.

Positive 1/0 100% Pure Copper Cable

Connect from the positive stud on the alternator to the positive on the battery

Ground 1/0 100% Pure Copper Cable

Connect from alternator mount bolt through the GROUND SENSOR LOOP to the negative on the battery

Ground 1/0 100% Pure Copper Cable

Connect from negative on battery to the frame/chassis

Depending on the application you may need to run a distribution block for better connections (if you have too many upgraded wires that cannot connect directly to the battery terminals).
UNI-BODY FRAMES: Additional steps may be required for proper grounding, You may need to choose a location on the sub-frame with the thickest metal for grounding.

If you have any questions feel free to email or call us as we are happy to help:

  • questions@js-alternators.com
  • (888) 245-3680

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