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how to know if your amp works at all?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=93903
Printed Date: May 19, 2024 at 1:41 AM


Topic: how to know if your amp works at all?

Posted By: mephsito
Subject: how to know if your amp works at all?
Date Posted: May 14, 2007 at 4:39 PM

Thanks for looking and helping if ya can.

heres the setup

have a ford focus 2006

aftermarket radio: Panasonic CQ-C8803U

amplifer: Alpine MRD-M605

Subwoofers: 2- MM2104

i remove the negative do all the wiring jazz in order as to not hurt my car or the amp. reconnect the negative from the battery after alls set in place and i turn on the car and theres no life of the amp.

now i have 3 loose cables in the harness kit one which is blue with a white strip, that be the remote turn on for amplifers correct? well now that leaves me with a blue cable (no stripe) and a orange with a white strip going to no where.

now i think and have check many documents saying thats how it goes and also asked some friends who have amps installed, they say the same thing.

now is there a way that i can check the amp out and make sure its not my wiring.

would this issue arise due to a doodiety harness?(bought it from circuit city)

would this just point clear out that its the amp that has an issue?

now i used the recommended wire gauge and made sure i had a good ground.

everything else in the car seems fine and the panasonic radio works great but could it be that its not sending the power to the amp?

any help would be great and if i left something vital to know of the set up ill update it asap

thanks again

chris



Replies:

Posted By: KPierson
Date Posted: May 14, 2007 at 4:56 PM

Check the voltage at the amp.  Check voltage from the power to the ground terminal (with the car off) and then turn the car on and check voltage from the remote wire to the ground wire.

You should read 12vdc for both tests.  If you don't have the power at the amp, then the amp won't turn on.



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Kevin Pierson




Posted By: mephsito
Date Posted: May 14, 2007 at 6:23 PM
thanks doing that in the morning




Posted By: DYohn
Date Posted: May 14, 2007 at 10:27 PM
Uh, if you have not connected the remote amp turn-on lead to the amp, then the amp will not turn on.

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Posted By: mephsito
Date Posted: May 17, 2007 at 12:47 PM
yeah it IS hooked up but it wont turn on.

the wire you are speaking about in my harness was a blue/white strip and i connected that into the radio's blue wire which is the turn-on lead.

i was wondering how

a: i can test my wiring and make sure i did it correctly

b: test the amp to make sure it works

it was a second hand amp off ebay so im worried the amp didnt work in the first place. goes to show buy new lol

thanks for the help i finally got me a reader to test the wire's

chris




Posted By: mephsito
Date Posted: May 17, 2007 at 12:50 PM
"the wire you are speaking about in my harness was a blue/white strip and i connected that into the radio's blue wire which is the turn-on lead."

i meant that i hooked it up to the blue/white one (which is coming out the stereo head) to the cord with my rca plugs (they were all joined, 2 rca's and the remote lead which is very very thin, could that be the issue?)

yeah sorry bout the double post didnt finish my first statement




Posted By: mephsito
Date Posted: May 17, 2007 at 2:03 PM
did what KPierson told me and got 12v when the car is off from power to ground

but i dont have 12v on remote to ground so its a wiring issue thanks for the help.

now i gotta figure out why the remote wire is not sending power out of the head unit....good way to learn

thanks again
chris




Posted By: DYohn
Date Posted: May 17, 2007 at 2:15 PM
My guess is the Blue/White wire is for power antenna and the Blue wire is the remote turn on from the HU.  Test it and see.

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Posted By: sarcomax
Date Posted: May 17, 2007 at 4:45 PM
I just had a kenwood deck that had a bad power antenna wire straight out of the box. the remote turn on wire was fine and the customer did not care so I used that one. To expand on what DYohn suggested turn the fm radio on and test for 12v at both the blue and blue white wires. then turn the cd player on and do the same. then obviously use the wire that was showing 12v for both tests. If they both do not work then lets hope you still have the reciept...





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