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blue sea systems - add a battery plus system

dremmeister Member Posts: 4
I am adding a 2nd (deep cycle) battery and installing blue sea systems add a battery plus product.  This product is relatively new and includes a dual circuit battery switch and an AC (plug into 110) and DC (use engine alternator) ACR (automatic charging relay).  The install recommends connecting a wire from the blue sea systems ACR to the START POSITION OF ENGINE IGNITION SWITCH <OR> another connection point that has positive voltage applied ONLY WHEN ACTIVELY CRANKING THE ENGINE.  The concept is to protect electronics when CRANKING THE ENGINE.  I have reviewed the service manual/electrical and ignition/electric start circuit.  Not really sure what I should connect this wire to specifically.  Any help or insight would be greatly appreciated.
2009 Hurricane FunDeck 196 RE
E-TEC 75 HP 2011
2009 Rolco Tandem Axle Trailer with Surge Brakes


  • bobg
    bobg Member Posts: 6
    edited March 2021
    You must connect it to the terminal on the key switch that is energized momentarily when the engine is cranking.
    Post edited by bobg on