Verify Second Battery Wiring Diagram


Jonnyswboy

CarAudio.com Recruit
Jun 28, 2019
52
3
Noob here just looking to have somebody check over my wiring diagram for my trunk battery. Also, is the only purpose of a battery isolator to prevent the trunk battery from charging the front battery? If that is the case than I don't think I really need one. Thanks!

17879
 
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keep_hope_alive

Acoustics Engineer
Premium Member
5,000+ posts
10+ year member
May 1, 2007
7,468
215
Quad Cities, IL
Yep, your diagram looks good.

The point of a battery isolator is to prevent draining your starting battery if you play music with the car off for extended periods of time. The challenge with a battery isolator is if you parallel two batteries at different voltages, the stronger one charges the weaker one much quicker than desired, shortening battery life.
 

Chrispy

Senior VIP Member
10+ year member
Oct 25, 2009
424
2
Southern IL
If he had a short with only one fuse, it would blow, but leave the other battery without the fuse to continue to short out............
 

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