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Wiring diagram for Battery Isolator  

Question:

Not sure what post 1-2-A-and E go to

1

Helpful Expert Reply:

For your battery isolator similar to # DW08771, you will have connection posts for each battery and for an alternator. The main battery will connect to position one and the alternator to the A post. The second battery will attach to the 2 via a circuit breaker that is rated appropriately for the battery. Output from the second battery positive post will then go to the items you want to power. I have included a picture that should help.

If you do not have a group 1 alternator then the E post will not be used. The alternator needs to have a max output of 120 amps to use this isolator. If you do have a group 1 alternator then you will use the E post and not the A post.

expert reply by:
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Jason S
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