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Amp Drawing Low voltage?

Old 03-17-2010, 05:35 PM
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Amp Drawing Low voltage?

I have a Hifonics Brutus 1500d amp. When off, and I measure on the terminals, it reads 12v.

When I turn my system on, the terminals only read 5v.

So, I've concluded that for whatever reason, my amp is only drawing 5v?

The "hifonics" light on the amp lights up, but the power LED does not.

Anyone have any ideas what could be going on?

I really hope it's not a problem with my amp.
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Old 03-17-2010, 05:47 PM
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the amp would be drawing 7 if your getting a reading of 5v, but does the amp work at all?
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Old 03-17-2010, 05:48 PM
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Yeah. It's been working for a long time. It also sometimes did this when I had my capacitor hooked up, which you helped me do, haha. But, I assumed it was the capacitor causing the problem.

So, yeah, it's always worked.
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Old 03-17-2010, 05:56 PM
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Check your fuses, and your grounds.
Test the fuses, don't just look at them.
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Old 03-17-2010, 06:16 PM
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just checked the fuses, theyre good.

my remote wire is on a switch. when the switch is off, i get 12v at the terminals.

when i turn it on, i get 5v.

and like i said, the amp lights up, but the power led does not. nor does the protect led, fortunately.
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Old 03-17-2010, 06:32 PM
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You have a bad connection.. probably a bad ground..
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Old 03-17-2010, 10:05 PM
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Just redid my ground completely.. so I don't think it's that. And all my other connections are solid.

Any other ideas?
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Old 03-17-2010, 10:35 PM
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if your battery is at 12 volts and your amp is at 5 volts... your power supply (wiring) is your problem

most likely if the amp was actually drawing that much power to give you 5 v then there would be a pretty severe short/ heat/ smoke issue involving blown fuses ... and your battery would be absolute toast
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Old 03-17-2010, 11:06 PM
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Well, I'd agree.

But, why is it that my wiring will read 12v when my amp is not on, but when it turns on, it drops to 5v?
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Old 03-17-2010, 11:36 PM
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try this,

with the car off, turn on the amp

with the amp on, try starting the car.

you either have a short somewhere or bad/wrong setting multimeter.
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