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Old 10-17-2004, 12:59 AM   #1
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Default 2 batteries still no power

Hi guys now i just came from the audio forum because i had some problem with my electrical items which were a 9'' dash tv, 15'' flip tv, dvd player,radio, sound modulator for the dvd plaer and an 1000 watt mtx.Mind you i just put a new battery n alternator on it 2. Now i put a 2nd battery on the car in the trunk like they said and it stoped my problem be now if i come to a hard stopp or just sittin at a light the battery gauge goes to the red in the car shuts off. I did a diagnostic-no problem. What can the be, i have 2 battery n a new alt i should be running a dam 36' house tv or fish tank or somethin man. I didnt have this problem out of my 93
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Old 10-17-2004, 08:20 AM   #2
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Where did you ground, and connect the second battery? What CCA are the two rated for?


-justin
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Old 10-17-2004, 01:11 PM   #3
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Default Re: 2 batteries still no power

Quote:
Originally Posted by 1993bonnie
Hi guys now i just came from the audio forum because i had some problem with my electrical items which were a 9'' dash tv, 15'' flip tv, dvd player,radio, sound modulator for the dvd plaer and an 1000 watt mtx.Mind you i just put a new battery n alternator on it 2. Now i put a 2nd battery on the car in the trunk like they said and it stoped my problem be now if i come to a hard stopp or just sittin at a light the battery gauge goes to the red in the car shuts off. I did a diagnostic-no problem. What can the be, i have 2 battery n a new alt i should be running a dam 36' house tv or fish tank or somethin man. I didnt have this problem out of my 93
We need a schematic diagram of how you hooked the two batteries and alternator. You've opened a huge can of worms here.
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Old 10-17-2004, 02:05 PM   #4
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I'd be willing to bet on not enough juice from the alternator to run all that.

Was it just a new alternater? Or a bigger one?
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Old 10-17-2004, 03:40 PM   #5
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I think you're on the right track, John. There'* no way a stock 105 amp alternator would keep up trying to charge 2 batteries. You need an isolator between the 2nd battery and the other battery/alternator, and you need at least a 160 amp alternator. You're going to fry your 105 amp alternator if you already haven't.
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Old 10-17-2004, 07:02 PM   #6
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its an 140 amp alt. I have the pos 2 the pos on the 2nd battery n the ground grounded 2 the side of the inside of the trunk. I went to an sound shop and they said it was hooked up the correct way. And the battery gauge stays on 14 or near it so its charging both batteries
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Old 10-17-2004, 08:15 PM   #7
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The problem you have is at idle, right? You come to a stop, or just sitting at a light like you describe? But when you're driving, it charges fine?

Your alternator isn't keeping up at low engine speeds, bud. Time to upgrade.
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Old 10-17-2004, 08:51 PM   #8
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yea like if i try tostab out i lose powerand it trys to die or at a light like you said. what do i need to upgrade 2 ---- a better alt?---
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Old 10-17-2004, 11:37 PM   #9
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Are you sure it'* a 140 amp alternator? That would not be a stock one.
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Old 10-17-2004, 11:42 PM   #10
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if you have a mulit-meter you can measure the volts that the alt is pushing at the battery under the hood and the trunk. I wouldnt trust that gague on the IP
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