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Thread: Second Battery?

  1. #31
    Join Date
    Mar 2004
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    Bluff Creek
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    322

    Re: Second Battery?

    Sounds good. So the 3 wire alt. hook up goes like this.

    http://www.rockcrusher4x4.com/images...atorWiring.PDF

    Running through the idiot light provides the ignition source? What do you think about trying to use the gen. since it is a 55 ampere?


  2. #32
    Join Date
    Mar 2004
    Location
    Bluff Creek
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    322

    Re: Second Battery?

    Picked up a battery iso off ebay. Gonna try to use it with 2 batteries and the exisiting charging system. I think it'll work just fine.

    Liesure Components dual battery isolator model 2496

    New, never installed.

    isolator rated at 160 amp, for a max. 135 amp alternator.

    includes installation instructions



    Last edited by Sasquatch; 09-25-05 at 08:11 AM.

  3. #33
    The Ape Man's Avatar
    The Ape Man is offline Cadillac Owners Connoisseur
    Automobile(s): '80 Fleetwood Coupe, 1994 and 1995 Mercedes 140 Coupe
    Join Date
    Feb 2005
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    Southern NJ
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    Re: Second Battery?

    We used almost the exact same isloator in fleet service when some of the upper maneagment got a brainstorm
    (always a dangerous situation as they were all headed for the out door). They had unfinished aluminum on the heatsink though. 2 doides in a sealed box is what you are looking at. Very reliable units. We punished them and they held up.
    Maybe try it with the Voltage sense wiring left stock at first then hook it up to the main Bat. You should see a .7 Volt increase in charring, er uh charging Voltage.

  4. #34
    Join Date
    Mar 2004
    Location
    Bluff Creek
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    Re: Second Battery?

    I'm gonna run the main BAT wire to the iso then from the iso to each battery. Should work great and I won't have to worry about a dead battery come starting time after letting the car sit with lights and stereo going. I think I'm gonna hook up a fuse box to the second battery that way any accessory I run with second battery will be fused. Ape are you saying that the increase in voltage could cause some melt down or "charring" of exisiting wiring?

  5. #35
    The Ape Man's Avatar
    The Ape Man is offline Cadillac Owners Connoisseur
    Automobile(s): '80 Fleetwood Coupe, 1994 and 1995 Mercedes 140 Coupe
    Join Date
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    Location
    Southern NJ
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    Re: Second Battery?

    Nope. There will not be an increase. Initially it will decrease. You are shooting for the original charging Voltage before modification. You will see if you measure Voltage at the main battery with the engine running and no accessories running. It will drop .7 Volts with the isloator connected. This is the reason to move the Voltage sense wire over to the battery or it's load circuit if a drop is anticipated.

  6. #36
    Join Date
    Mar 2004
    Location
    Bluff Creek
    Posts
    322

    Re: Second Battery?

    Well finally got around to hooking everything up. My question is this. In the directions it suggested hooking a circuit breaker between the auxillary battery and the isolator. The wire from the isolator goes to the top post on the circuit breaker marked BATTERY and the wire from the bottom post marked AUX goes to the second battery. I've included a pic. Is this correct? Normally when using these in conjunction with a battery to accessory I'm thinking you go from the battery to the top post and then from the bottom post to the accessory. In this case it should be hooked up like I have it. The top post is where current comes in and the bottom is where it goes out. Correct? Thanks for any help. Also hooked up a fuse box in the car for the second battery.


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