tomlintm Posted April 26, 2020 Report Posted April 26, 2020 i noticed somthing with my rear battery for some reason it stays between 14v and 13.9v and my front battery is at a constent 14.32v and i did do the big 3 upgrade andi did fix a bad ground issues on the rear battery currius if that caused the battery to be half dead and it needsto charge up again idk whatndo you all think
1point21gigawatts Posted April 26, 2020 Report Posted April 26, 2020 8 minutes ago, tomlintm said: i noticed somthing with my rear battery for some reason it stays between 14v and 13.9v and my front battery is at a constent 14.32v and i did do the big 3 upgrade andi did fix a bad ground issues on the rear battery currius if that caused the battery to be half dead and it needsto charge up again idk whatndo you all think Disconnect the rear battery and read its rest voltage and go from there. Most likely you need to charge it. Charging is imperative. “How can we help you?” “And don’t forget to tell them that the customer isn’t always right.”
tomlintm Posted April 26, 2020 Author Report Posted April 26, 2020 12 minutes ago, 1point21gigawatts said: Disconnect the rear battery and read its rest voltage and go from there. Most likely you need to charge it. Charging is imperative. is it bc i had a bad ground i also notice that it does groudualy increase in voltage after a bit of idleing and no music
1point21gigawatts Posted April 26, 2020 Report Posted April 26, 2020 1 hour ago, tomlintm said: is it bc i had a bad ground i also notice that it does groudualy increase in voltage after a bit of idleing and no music Possibly and caused discharge. Go disconnect your rear battery and charge it. “How can we help you?” “And don’t forget to tell them that the customer isn’t always right.”
SnowDrifter Posted April 26, 2020 Report Posted April 26, 2020 How much current is going to your rear battery as you're measuring that voltage difference? ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444
tomlintm Posted April 26, 2020 Author Report Posted April 26, 2020 30 minutes ago, 1point21gigawatts said: Possibly and caused discharge. Go disconnect your rear battery and charge it. i dont have a battery charger
tomlintm Posted April 26, 2020 Author Report Posted April 26, 2020 4 minutes ago, SnowDrifter said: How much current is going to your rear battery as you're measuring that voltage difference? from the front before and after the 300amp fuse is 14.32v under the hood
1point21gigawatts Posted April 26, 2020 Report Posted April 26, 2020 I was just thinking, a cell in that battery might have gone bad. Or maybe the battery is just discharged like shit. Either way, disconnect it and then go get a battery charger and charge it and find out if it just discharged or damaged. To be safe disconnect it ASAP until you diagnose the problem with that battery. “How can we help you?” “And don’t forget to tell them that the customer isn’t always right.”
slowfkncar Posted April 27, 2020 Report Posted April 27, 2020 That's about a 2% drop from front to rear, 15ft of copper (not cca) 1/0 would need to pull 100A to hit that, its possible you have a bad connection,bad battery or insufficient/low quality wiring. If all batteries sit at 12.7v+, I would inspect the wiring from front to rear, if the drop is linear from front to rear, the cable simply can't handle your needs. Hopefully its just a simple hot spot somewhere (bad crimp,fuse holder ect)
tomlintm Posted April 27, 2020 Author Report Posted April 27, 2020 11 hours ago, slowfkncar said: That's about a 2% drop from front to rear, 15ft of copper (not cca) 1/0 would need to pull 100A to hit that, its possible you have a bad connection,bad battery or insufficient/low quality wiring. If all batteries sit at 12.7v+, I would inspect the wiring from front to rear, if the drop is linear from front to rear, the cable simply can't handle your needs. Hopefully its just a simple hot spot somewhere (bad crimp,fuse holder ect) well all my wires are ofc but the one ground in the rear battery connecting it to the frame is cca would that be my problem
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