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any help appricated please, voltage dropp


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anyways... so on my way home last night i realized my voltage was dropping a bit, and i got up this morning started my car and it was sitting at 13.5, usally sits at 13.9-14.0 on a cold start....so then i started to sit at 13.4, i went full tilt after school and it dropped to 12.1, thats not normal, full tilt i never drop below 12.8, wtf is the problem?

i have my voltmeter wired at my sub amp, ever since i therw the hc1400 in i havent had any problems, what happend all the sudden? i havent gotten around to checking either of the batts yet, just the connections, still gotta find my DMM

Legal TL scores145.6 on the dash sealed up in the low 40hz area with the port out145.5 on the dash sealed up @30hz with the port inless then 1k clamped on a 3.5k!

Why would you EVER WANT flex?
huh?...flex is what can make the lows lower and more air being pushed correct?
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both batterys read right, couldent get an exact but i couldent find my dmm so i had to use an old one with a needle, its acurate to the area tho, so the fucks my problem?

also could it just be the humidity?

Edited by Freshman6969

Legal TL scores145.6 on the dash sealed up in the low 40hz area with the port out145.5 on the dash sealed up @30hz with the port inless then 1k clamped on a 3.5k!

Why would you EVER WANT flex?
huh?...flex is what can make the lows lower and more air being pushed correct?
jeff_zps9bc81ace.jpg

me_zps0fb5a5b4.jpgMy FeedbackJeep-BuildlogPT LOSER buildlog

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make sure alt is tigntened down. My + wire came undone from vibration and caused voltage drop to lower 10's.

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make sure alt is tigntened down. My + wire came undone from vibration and caused voltage drop to lower 10's.

true...ill check it out after i take a nap :)

Legal TL scores145.6 on the dash sealed up in the low 40hz area with the port out145.5 on the dash sealed up @30hz with the port inless then 1k clamped on a 3.5k!

Why would you EVER WANT flex?
huh?...flex is what can make the lows lower and more air being pushed correct?
jeff_zps9bc81ace.jpg

me_zps0fb5a5b4.jpgMy FeedbackJeep-BuildlogPT LOSER buildlog

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A nap....LOL, check all grounds, check alt power wire, check to make sure you didn't pop a fuse somewhere and it is limiting your transfer and if that all pans out, get alt tested, then if that is good, test with vehicle off and radio on and see what your drop looks like, if it nasty bad you got a battery issue. Hope it helps!!!!

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could be a bad battery. maybe a bad diode in the alt. take it to an auto parts store and have them test the alt. they can do it without taking the alt out and its free.

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ordering an alt this week anyways, so i could careless about the alt, ima run and check my grounds, just dont wanna move my box blehhh

Legal TL scores145.6 on the dash sealed up in the low 40hz area with the port out145.5 on the dash sealed up @30hz with the port inless then 1k clamped on a 3.5k!

Why would you EVER WANT flex?
huh?...flex is what can make the lows lower and more air being pushed correct?
jeff_zps9bc81ace.jpg

me_zps0fb5a5b4.jpgMy FeedbackJeep-BuildlogPT LOSER buildlog

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ordering an alt this week anyways, so i could careless about the alt, ima run and check my grounds, just dont wanna move my box blehhh

Make sure it isn't a bad battery before putting in your new alt.. it will kill it quickly.

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