Amp cut off, low voltage why?

[raolito1980 2]

I just came back from the store but before I made it home my amp, a JL Audio 1000/1 cut off and the low voltage light came on. I have 1 gauge wiring with Big 3 and 1 gauge running to my rear battery. Both my battery are Optima Red Tops. I was listening to at very low volume like 5 and I decided to crank it and after 8 or 10 seconds it cuts out. I'm pushing a 12W7 so I'm not sure whats the deal. Can it be the stinger 200 amp isolator that I have in between my 2 batteries? All my connections are tight and grounded good. What am I missing? I need to fix this so any suggestions? I think this is like the second time it happens. I believe it happened before, so now that I seen the blue LED light it has to be that, but dont know what. It in a 2006 Nissan Altima.

[Sir-Lancelot 216]

woofer wired correctly?

To me that edlectrical sound pretty good for just 1000w.

[bigrank916 72]

You say this has happened before, right? What did you do then about the problem?

[shizzzon 461]

first off, if u really do have an isolator back there, get rid of it.

Isolators will drop voltage in the output right off the bat so that's part of the problem.

If u need isolation, get a solenoid instead.

Second, are all your batteries even fully charged cuz it doesnt sound like it.

Put them on a load tester, reading their rest levels means nothing.

[Julian 641]

also check all your grounds and positives, this happened to me when my ground wasn't secure so it came undone slightly and it dropped my voltage like 3v

[Dutchie. 10]

Big three, better alternator, better battery, no isolator. Problem solved.

[Mac N Cheese 90]

Big three, better alternator, better battery, no isolator. Problem solved.

you can't assume a new alternator might fix the problem, for all we know it could be a loose wire, poor ground

[1200 bandit 2]

Sounds like something is loose.Check your grounds, positves, and remote wires and also I would not use that isolator.

[millertime 12]

i had the same kind of problem.. i took a DMM and tested volts at the amp .. tested pos. wire and the ground.. had 5.3 volts... then tested from power at the amp to were it was grounded.. same 5.3 volts... then tested to another ground and had 12.7... took the ground off and re-cleaned were it hooked and it fixed it.... i had had this ground hooked here for 2 years before with no problems..

[raolito1980 2]

woofer wired correctly?

To me that edlectrical sound pretty good for just 1000w.

Yes the woofer is correct. Its been intact for 2 years now.

[raolito1980 2]

You say this has happened before, right? What did you do then about the problem?

I checked all my connections and thats when I did my Big 3. And it was fine until last night.

[crownvicon24's 0]

Have your batteries load tested. Especially the rear one and as mentioned in another post check your ground on your rear battery.

[raolito1980 2]

first off, if u really do have an isolator back there, get rid of it.

Isolators will drop voltage in the output right off the bat so that's part of the problem.

If u need isolation, get a solenoid instead.

Second, are all your batteries even fully charged cuz it doesnt sound like it.

Put them on a load tester, reading their rest levels means nothing.

My front battery was fully chaged. Last night I went to my brothers and we attacked the issue right then and there. I figured it was the isolator. I WAS going to just disconnect my isolator, while in the process the positive ignition wire came loose. We hooked it back up and it was banging like normal. I left it on for a good amount of time. I didnt bother checking that particular wire from the get go. What an idiota I am. About the solenoid, where can I get that from? Which would you suggest or where can I look for one. Thanks. If I can a solenoid then I will be removing the isolator.

[raolito1980 2]

problem solved guys. I fixed the problem last. A loose wire (ignition) on the isolator proved to be at fault.. Thanks for the inputs and advice.

[shizzzon 461]

so that means the charge from the alternator wasn't getting through, correct?

It sounded like the battery was at fault.

Do not let your alternator try and charge discharger batts if they are too low or you'll be buying a new alt soon.

[raolito1980 2]

Have your batteries load tested. Especially the rear one and as mentioned in another post check your ground on your rear battery.

I fixed it last night.. A loose wire wasnt letting my rear battery get charged. Thanks.

[raolito1980 2]

so that means the charge from the alternator wasn't getting through, correct?

It sounded like the battery was at fault.

Do not let your alternator try and charge discharger batts if they are too low or you'll be buying a new alt soon.

Correct. Charge wasnt getting through.

[Mac N Cheese 90]

Have your batteries load tested. Especially the rear one and as mentioned in another post check your ground on your rear battery.

I fixed it last night.. A loose wire wasnt letting my rear battery get charged. Thanks.

glad to hear it