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relocated battery, installed kill switch, battery voltage lower then normal!!

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Old 10-04-2008, 07:20 PM
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Exclamation relocated battery, installed kill switch, battery voltage lower then normal!!

ok i installed my kill switch in the back with a lever, i used a painless wiring alt relay(so the car turns off when u shut the master switch), and i relocated the battery to the back, ok when i start the car the battery voltage reads little bit over half on the volt meter on our cars, but after 5 to 10 mns of driving it goes under the halfway point, but dosnt reach the red dots on the volt meter, whats causing this? by the car isnt turning off when the voltage goes down, before i did all this it would be at the half way poing when engine is running, now its lower, would an optima help this?

im kinda thinking since the cable are so long, the alternator is having trouble recharging the bat?
Old 10-04-2008, 09:11 PM
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What size wire did you use? Have you put a volt meter on the battery to see if its your gauge giving you a problem?
Old 10-05-2008, 12:38 AM
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0 gauge wire, i doubt its the volt meter, since it was perfect before
Old 10-06-2008, 01:53 AM
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anyone?
Old 10-06-2008, 12:46 PM
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anybody?
Old 10-06-2008, 12:59 PM
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check it with a multimeter to see what kind of charge you are getting. Have you done that?
Old 10-06-2008, 03:50 PM
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Originally Posted by 180ls1
check it with a multimeter to see what kind of charge you are getting. Have you done that?
no, what would that do, check thebattery directly?>
Old 10-06-2008, 07:17 PM
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Originally Posted by themack56
no, what would that do, check thebattery directly?>
well you would start at the battery to see what you are getting and then work your way up untill you have full power then you know where you are losing the power or maybe your alt is not cranking out enough power to begin with.
Old 10-06-2008, 07:48 PM
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Originally Posted by 180ls1
well you would start at the battery to see what you are getting and then work your way up untill you have full power then you know where you are losing the power or maybe your alt is not cranking out enough power to begin with.


it was before, im kinda thinking, its to weak, cause the battery is to far!!, i do have an underdrive pulley, im gonna try an overdirve pulley on the alt
Old 10-06-2008, 11:31 PM
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Originally Posted by themack56
it was before, im kinda thinking, its to weak, cause the battery is to far!!, i do have an underdrive pulley, im gonna try an overdirve pulley on the alt
ya that seems to be a good bet since the relocated battery and underdrive pulley would make it hard on your alt, the overdrive pulley should fix it. If not a multimeter is your friend to find the source of the problem.
Old 10-07-2008, 12:17 AM
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Let us know how it turns out.
Old 10-07-2008, 12:21 AM
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will do, i just ordered the overdrive pulley and the new belt from thunderracing.com, by the way today after work, i tried to turn the car on and it would turn on, battery died, i jumped the car and drove home fine, but i think since the alternator is charging to its full capacity, i think im turning the car off when the battery is low, and when i try to turn it on, it wont
Old 10-07-2008, 12:56 AM
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did you add any extra grounds along the way? you need extra grounds to strengthen the continuity.

youre suffering from what's called attenuation.
Old 10-07-2008, 01:01 AM
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add one atleast in the trunk area. maybe another down the line also.
Old 10-07-2008, 08:57 AM
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i have 2 grounds up front, and 1 in the back for the batt
Old 10-07-2008, 09:02 AM
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make sure the ground at the back for the battery is clean - spotless....even hit it up with some sandpaper to get a good bare metal connection.
Old 10-07-2008, 09:38 PM
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well i disconected the alternator from the battery, and imediately the battery voltage went even lower, then what it was, i reconected quickly and voltage went up , to were it sat right before the red dots, so i know the alternator is making power, i honestly think the ud pulley is making prob, cause of the distance of the battery, im gonna try and put the overdrive alternator pulley, when it comes in!! if that dont work then im gonna take the battery and have it checked, if it checks out fine then a new alternator it is
Old 12-02-2008, 10:29 AM
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how did this work out for ya?
Old 12-02-2008, 10:41 AM
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post up some pics of your work please
Old 12-02-2008, 10:53 AM
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will do, the problem was that, i also installed a amp relay. So that when i kill the battery, the alternator would die as well. What i didnt know is that the amp relay draws current even when the car is off. So when im not at the track it has to be disconected!!



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