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installing battery isolater


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johnhunter247 
Member - Posts: 1
Member spacespace
Joined: November 23, 2012
Location: Michigan, United States
Posted: November 23, 2012 at 1:44 PM / IP Logged  
< language=> I purchased a battery isolater(stinger spg32). I want to install it between my car battery and my kinetic battery. I have a 2012 Ford Fusion and need to know where the ignition harness is and what color the true ignition power wire is that I need to tap into. I can't seem to find a wiring diagram anywhere. Any help would be greatly appreciated. 
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: November 23, 2012 at 3:41 PM / IP Logged  
Ah - you mean you purchased a Stinger SPG32 RELAY.
I dislike how they call it a "battery isolator" - it's just a relay (aka contactor, solenoid, etc).
Some might think they do it to fool people into thinking they are buying a battery isolator (eg, voltage sensing, UIBI kit, etc) so they then have to buy an additional voltage sensing attachment. But I guess they can get away with that stateside (they'd be crucified here).
Unless you intend having both batteries in parallel during cranking, I'd suggest you use the ACC line.
If using IGN, ensure both battery-end fuses can handle the cranking current.
I would however suggest a proper battery isolation circuit. If a charge or not-charging light or signal is available, IMO in general the best system is for that to control the relay (eg - search for UIBI or google "oldpsark uibi"), otherwise the more expensive and generally inferior voltages sensing aka "smart" isolators.

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