do i need the big 3

[conor_thompson 10+ year member]

What do I do to connect my amps power wire to my fuse box on my car

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[Tenacious]

Your amps power wire goes to your battery.. Which should have an external fuse in it near the battery

The big 3 consists of a wire from:

1. Alternator + to battery + (use factory master fuse or an external in-line fuse)

2. Battery - to chassis ground

3. Engine block or alternator case to chassis ground