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Re: hooking up two batteries in plow truck
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Posted by KEB on November 10, 2006 at 14:54:13 from (192.31.106.34):
In Reply to: hooking up two batteries in plow truck posted by jbird on November 10, 2006 at 12:35:16:
Depends on why you want two batteries. If its to increase starting current, then connect pos to pos and neg to neg as noted below. Just be aware that the batteries should be matched, i.e., the same size and roughly the same condition. Otherwise there will be potential problems with one dragging the other down. If you want the second battery to power the snowplow, go to an RV store and get a battery isolator (or order one off the web). Both batteries will charge off the engine, but the second one will be disconnected when the engine is not running. The isolator will come with wiring instructions. If you don't have to have the additional cranking capacity, isolating the second battery has the advantage of being able to give yourself a jump start, since the isolator will prevent the second battery from discharging if you do something like leave the lights on. Some RV's use a selenoid to accomplish this, but you can do the same thing with a jumper cable. Keith
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