I've used either battery to jump a truck, but when it's real dead I've used 2 cars hooked to both batteries, the idea is sound tho on the "GM" mod, but my brother does stereo and recommends increasing the wire gauge size for ground, positive, and alt to battery(ies)
I had to ask, thanks for the reply!
I dont think it really makes a difference until you start talking about isolators or moving batteries out of the engine compartment.
The amount of wire to run them directly from the alternator or in series wont gain you much IMO.
Your money is best spent in a high output alternator and large gauge wire with good connectors.
common on Ford to upgrade the wiring also but in an OEM application without extra loads
you won't see a benefit unless your OEM cables/connections are compromised
the batteries also don't know the difference if the lead goes from the ALT to one positive terminal and then from terminal to terminal on the batteries
Thanks for the quick feedback!
So, the GM mod is basically a "preference" scenario? meaning: it doesn't really MATTER, just as long as the cable connecting the batteries is working properly & is of the correct size?
My cables looked surprisingly well, the connectors...well, they're debatable.
I couldn't find my Fluke-meter to check the batteries.
So, I hooked up the battery charger. Passenger Side Battery (assume this is Primary) was around 75%. When it charged, I hooked the charger up to the Drivers Side Battery (assume this is Secondary?). It was at about 25% charge. What the???
Batteries are dated 11/11, but they are cheapo WalMart 750CCAs. I've got to check the warranty on them.
I'm still going to clean things up and get everything tested out. That was a significant shift in charge capacity between the two batteries.
After I know my alternator and batteries are good ($$$), I'll go to Rock Auto & buy all new OEM-type cables. Don't have time to build my own...
I'll let you know what I came up with. Thanks again!