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post #1 of 15 (permalink) Old 02-28-2008, 02:38 PM Thread Starter
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Battery

Ok, i just got a sub and amp put into my car olmost two weeks ago, two times now this week i have gone out to start my jeep and the battery is dead. I only have 2000 miles on my jeep, so its relatively new. Has anyone else had problems like this. Im going to take it and get the bettery checked, as i have checked and rechecked and have not left anything on like lights, or anything.
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post #2 of 15 (permalink) Old 02-28-2008, 02:47 PM
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sounds like the new sound system is wired improperly and is draining the battery even with the jeep off.
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post #3 of 15 (permalink) Old 02-28-2008, 03:09 PM
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Stock battery is small. Stock alternator is small. If the system is wired properly then i'd change one or both depending on how serious of an audiophile you are. Your lights should have been dimming like crazy when you had it going.
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post #4 of 15 (permalink) Old 02-28-2008, 03:22 PM
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Yes, the battery is a tad small, but this IS a small vehicle, too! A new small Chev truck comes with a 125 amp alternator, vs. 120 on the Pat.) and the Chevy's stock battery is 690 vs. the 525 in the Pat.

So, two things:

1) You've got an electrical drain that is much more than leaving the dome light on, which shold not drain the battery over night--normally takes a week parked at the airport to do that for me!

2) You should replace your battery with the largest that will fit in that space, when you need to replace it. Most of us in severe cold or hot climates, usually do this every 2 -3 years, anyway.

But--fix that electrical drain--that's the problem, not the alternator or the battery.


Jack Allwardt, Bonney Lake (Tehaleh area), WA; (REPEAT Patriot Owner) Retired engineer, US Army veteran, Member: American Legion, Central Valley Vietnam Veterans, Enumclaw (WA) Lions Club. Former vintage military jeep owner, instrument rated commercial pilot, ag pilot, vintage aircraft restorer and test pilot.
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post #5 of 15 (permalink) Old 02-28-2008, 04:41 PM
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i agree that there might be something wrong with the wiring... i'd check if the amp is turning off when you turn off the jeep and take the keys off the ignition... it might be that the remote wire for the amp was spliced into a contstant power source instead of a remote source...

i'm not very good with technical terminologies... so i apologize if i created more confusion than help... but all in all your battery should not be drained by your stereo set up when the vehicle is off... if your getting a the Christmas lights effect on your instrument lights everytime the bass hits on your system... a capacitor might be a good idea as well...

hope that helps and good luck....
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post #6 of 15 (permalink) Old 02-28-2008, 09:08 PM
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You can start checking for the drain with an ohm meter. All you need to do is (with the jeep off) disconnect the negative battery terminal and using the two leds from the tester make a connection between the negative battery cable and the negative post. If there is no drain this should result in a 0 reading. However if there is a drain it will show up on the meter. If there is a drain you can pull fuses in the fuse panal until you find the circuit and trouble shot it from there.

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post #7 of 15 (permalink) Old 02-28-2008, 11:51 PM
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Quote:
Originally Posted by JeepPatriotGirl00 View Post
Ok, i just got a sub and amp put into my car olmost two weeks ago, two times now this week i have gone out to start my jeep and the battery is dead. I only have 2000 miles on my jeep, so its relatively new. Has anyone else had problems like this. Im going to take it and get the bettery checked, as i have checked and rechecked and have not left anything on like lights, or anything.
I am starting to sound like a broken record, but here it goes again. I am such an avid promoter of Optima batteries, especially the Deep Cycle Yellow Top http://ttp://www.optimabatteries.com/audio_electronics/ They will give you all of the power you need for bass as well as starting up the Patriot with no problems. Yes, fix the short, but I do recommend a Yellow Top.

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post #8 of 15 (permalink) Old 02-29-2008, 06:36 AM
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I am starting to sound like a broken record, but here it goes again. I am such an avid promoter of Optima batteries, especially the Deep Cycle Yellow Top http://ttp://www.optimabatteries.com/audio_electronics/ They will give you all of the power you need for bass as well as starting up the Patriot with no problems. Yes, fix the short, but I do recommend a Yellow Top.
Little OT. but with what battery did your's come with?
At least mine (CRD limited -08) came with optima redtop

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post #9 of 15 (permalink) Old 03-01-2008, 02:03 PM
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Quote:
Originally Posted by DJ XS View Post
I am starting to sound like a broken record, but here it goes again. I am such an avid promoter of Optima batteries, especially the Deep Cycle Yellow Top. They will give you all of the power you need for bass as well as starting up the Patriot with no problems. Yes, fix the short, but I do recommend a Yellow Top.
I second that.
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post #10 of 15 (permalink) Old 03-03-2008, 02:09 AM Thread Starter
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Thanks everyone, i acually went in to circuit city where i got it installed and they knew write away what whas wrong, the guy who installed it (acually turns out he was the manager) did not know what he was doing and connected my amp to a constant power source. I told my brother that there was a light on my amp that was allways on, and he said to take it it. I took it in and a different guy hooked up a remote source and he explained it to me but as i am not michanically inclined i dont remember the termanology. So now it works plus becouse they are the ones who messed up they refunded me $20 dollers for the hassle of having to go back into the store and deal with this. It works great now, i just cant have the amp and sub on when the engine is not running, i dont know if there is anything i can do about that.
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post #11 of 15 (permalink) Old 03-03-2008, 11:12 AM
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It works great now, i just cant have the amp and sub on when the engine is not running, i dont know if there is anything i can do about that.
So much for those wild tail gating parties...

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post #12 of 15 (permalink) Old 03-03-2008, 11:33 AM
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You need a second battery and battery isolator for the Amp. (or possibly an alternator with dual outputs and a second battery).

This way you can drain the secondary battery without affecting your main one:

http://www.bcae1.com/battiso.htm
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post #13 of 15 (permalink) Old 03-03-2008, 01:31 PM
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You need a second battery and battery isolator for the Amp. (or possibly an alternator with dual outputs and a second battery).

This way you can drain the secondary battery without affecting your main one:

http://www.bcae1.com/battiso.htm
That's not necessary for a small system. Run a cap 1000 watts for ever 1 fared cap you use.

I have 3000 watts running for 2.5 hrs with my cap on my srt.
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post #14 of 15 (permalink) Old 03-03-2008, 02:25 PM
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Go to Kragen, Autozone, Pep Boys--whatever store you have in your area and buy a junp-start kit--they're less than $50, and you can have that in standby if you run your battery down. Mines not much larger that a full size novel (War and Peace, I believe....)

We would do this 2nd battery/isolation (AKA: uninteruptable power source--UPS) trick mentioned in a previous post for avionics in airplanes, that way the radios/nav gear always had their own power incase the alternator blew up, and they do on a more frequent basis than you'd imagine..


Jack Allwardt, Bonney Lake (Tehaleh area), WA; (REPEAT Patriot Owner) Retired engineer, US Army veteran, Member: American Legion, Central Valley Vietnam Veterans, Enumclaw (WA) Lions Club. Former vintage military jeep owner, instrument rated commercial pilot, ag pilot, vintage aircraft restorer and test pilot.
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post #15 of 15 (permalink) Old 03-03-2008, 03:08 PM
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A lesson I learned over the years: Unless you have a deep cycle battery, I would never let a battery drain below the ability to start the car.

Especially if you have a battery with high cold cranking amps (used more in the north), they will not last more than a few discharges. At first read it seems counter-intuitive, but the higher the CCA, the less times you can discharge the battery without losing its ability to re-charge.
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