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  #1  
Old 10-30-2013, 01:01 PM
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Default Weird issue

Did an install in a friends car last weekend(2002 monte carlo).After playing her subs for a couple of days she blew one of the dustcaps off so last night i took it out so that i could glue the dustcap back on for her.

Well when i tried to hook up some temp music for her it sounded good at low volume, but when turning it up the bass went away and kept going in and out of protection. First thing i checked was rear battery voltage which was resting at 11.6 (low i know). Ground was still nice and tight (on strut mount basically). Starting battery was at like 12.6 or 7. Power wire running from the front was a bish to put in and the only spot is admittedly somewhat close to the exhaust and im kinda wondering if it got too hot and was ruined.

Only other thing i can think of is a bad speaker or something with the amp. It was dark at the time and my neighbors and jerks so i didnt wanna push my look. but please feel free to drop any suggestions of things i can try to cover all of my bases. Thanks brohams.
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Old 10-30-2013, 02:43 PM
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Have you check the fuse running to the back battery? If the back battery is dying and not charging, your amp will take too much power for the battery to keep up with and go below running voltage.

Last edited by xnewbx; 10-30-2013 at 02:46 PM.
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Old 10-30-2013, 02:49 PM
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Thats one of the first things i always check. theres no problem with the fuse or anything like that. Is there any way that i can use my miltimeter to tell if theres actually proper power coming from the front?
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Old 10-30-2013, 02:52 PM
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Quote:
Originally Posted by Beatdown337 View Post
Thats one of the first things i always check. theres no problem with the fuse or anything like that. Is there any way that i can use my miltimeter to tell if theres actually proper power coming from the front?
If you turn the car on the back battery should jump in voltage if it's getting power. Then you can hook the volt meter to your amp and see what type of power it's receiving.
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Old 10-30-2013, 04:22 PM
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i was thinking the same thing last night. So i measured the battery voltage first with the car off and got 11.6. Measured it again with the car on and got 11.8. Still seems really low
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Old 10-30-2013, 04:27 PM
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sounds like a bad ground or a partially blown fuse
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Old 10-30-2013, 04:34 PM
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You should check your wiring and consider replacing your fuses after you have thoroughly checked your wiring. It sounds like your getting no power in the back and fuses do not typically go for no reason if that's the case.

It could be simply a loose wire making a bad connection.or as wolf said. check your ground.

Also since you have your multimeter, you can put your meter directly on your battery ground point where it's grounded to the car, and put it on your battery, that should give you an interesting reading.

Last edited by xnewbx; 10-30-2013 at 04:41 PM.
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Old 10-30-2013, 04:37 PM
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bad cell in one of the batteries? i would try a load test
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Old 10-30-2013, 05:01 PM
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well its def not a fuse because right now its going straight front to back without a fuse and then i have a fuse inline between the battery and amp. so its def not that. Im thinking options have got to be either the ground or something to do with the power wire.
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Old 11-01-2013, 09:38 AM
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its been raining like a mug here so i hadnt really had a chance to mess with this too much. the one thing i did do is like someone suggested use the ground from the car and get voltage at the amp and just like at the batt its reading 11.6. So it would seem that the ground is working fine
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