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Old 03-21-2020, 08:36 AM   #1
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Join Date: Oct 2010
Posts: 132
Blue Sea ACR on 08 Endeavor

I want to install one of these to replace the MadTec isolator relay and Tombretta
Looking for info on how others installed these
Did you leave the MagTec relay in place. If so what did you connect or disconnect

Did you connect it to the battery boost switch. As we have never had to use ours I am considering not connecting it up front
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Old 03-21-2020, 09:25 AM   #2
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Join Date: Jul 2014
Posts: 28,541
You can leave the old relay in place as a junction point and use short cables to the new relay if that seems easier. Make sure you use same gauge cables and remove the wires from one small terminal and tape up.

If it has a manual handle on it to connect the batteries, you can just get out and use that as the boost switch, if needed.

No real good reason to have it wired to the dash switch except convenience.
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Old 03-22-2020, 05:50 AM   #3
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Join Date: Mar 2011
Posts: 819
I have installed ML-ACRs to replace Diode isolators as well as Big Boy systems. I remove everything that is no longer needed and then install the ML-ACR in the best place to make the electrical connections. You need two wires to the dash mounted switch, or you can install it without the remote switch and just let it do its thing. You can always override the operation using the yellow manual switch integrated to the ML-ACR.

Paul Whittle
2005 Monaco Signature 45'
525 HP/1850 Ft Lb ISX-15/6-Speed Allison 4000
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