Join Date: Feb 2000
Location: Minot, ME
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Re: Homemade dual battery isolator ??
I agree with CJdave's moonguy crew chief. The dead batt would be robbing cranking power from the secondary batt (which is fully) charged. In the ideal situation, you wound want a big ass diode to keep current from flowing INTO the primary batt during cranking only. However, big diodes can cost money, get real hot, and often still break! Even if the primary batt is completely dead, the secondary batt should still be able to crank over the motor, just like using jumper cables. Nice schematic mr rush, that's the way mine will look, no diodes.
[img]/wwwthreads_images/icons/cool.gif[/img] Big Ed
<font color=red>'88 YJ, 4" susp,3" body,33's,283 Chevy V8,TH350,4.11's,D30,D35c</font color=red>