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In line Fuse voltage to amp


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nbahoopstar 
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Location: California, United States
Posted: April 15, 2016 at 1:07 AM / IP Logged Link to Post Post Reply Quote nbahoopstar
I have 14.4 volts going into my inline power amplifier 40 amp fuse. On the output side of the fuse however, the voltage drops to 1.2 to 1.4 volts approximately. The 5 channel amp does not have any lights or other visual confirmation of power.
I have checked ground at amp as well as both fuses in the amp.
I am probably overlooking something very basic.
I have digital fluke meter to test. Any thoughts, suggestions, are greatly appreciated.
Loud Subwoofers only, do not make a quality car audio system, especially when they are worth more than your "car"
i am an idiot 
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Posted: April 15, 2016 at 9:26 PM / IP Logged Link to Post Post Reply Quote i am an idiot
Change the fuse that has 14 volts on one side and 1.4 on the other side.
laws 
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Posted: April 23, 2016 at 11:13 AM / IP Logged Link to Post Post Reply Quote laws
Have you checked that the remote wire has power?
rs specialist 
Copper - Posts: 175
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Posted: April 25, 2016 at 11:48 AM / IP Logged Link to Post Post Reply Quote rs specialist
If I am understanding you correctly you have 12 volts at your fuse but 1.2 volts at the amp.
Remove the power and ground from the amp. Check them not connected to the amp. If you have 12 volts on the constant then you may have an internal issue with the amp.
Make sure that you connect the positive lead from you meter to your constant from the battery and negative lead to your ground wire.
If this test still shows 1.2 volts then you may have an issue with the fuse and/or fuse holder.
i am an idiot 
Platinum - Posts: 13,470
Platinum spaceThis member consistently provides reliable informationspace
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Posted: April 25, 2016 at 5:26 PM / IP Logged Link to Post Post Reply Quote i am an idiot
Change the fuse that has 14 volts on one side and 1.4 on the other side.
i am an idiot 
Platinum - Posts: 13,470
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: April 25, 2016 at 5:30 PM / IP Logged Link to Post Post Reply Quote i am an idiot
If he disconnects the power and ground from the amplifier he will get 14 volts. With the amp disconnected there will be no current draw through the bad fuse. No current draw = 0 voltage drop.
nbahoopstar 
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Posted: April 26, 2016 at 10:18 PM / IP Logged Link to Post Post Reply Quote nbahoopstar
I have 18.65 volts incoming to the inline fuse under the hood. On the output side of the same fuse under the hood, my meter (and amp power) read 1.02 volts.
My H/U displays but no sound of any kind. I have tested and replaced the power amp fuse under the hood without any change.In line Fuse voltage to amp -- posted image.
Loud Subwoofers only, do not make a quality car audio system, especially when they are worth more than your "car"
nbahoopstar 
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Posted: April 26, 2016 at 10:20 PM / IP Logged Link to Post Post Reply Quote nbahoopstar
The fuse and fuse holder are both brand new "DB Link" products.
Loud Subwoofers only, do not make a quality car audio system, especially when they are worth more than your "car"
series vii 
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Posted: April 27, 2016 at 2:30 PM / IP Logged Link to Post Post Reply Quote series vii
18.65V???? Sounds like you have bigger issues to deal with. If you are running a standard 12V electrical system, 14.7 would be highest you would want to see. I would say your voltage regular has failed and or the alternator has gone full field. Very good change you have fried a few things if the voltage is that high.
nbahoopstar 
Member - Posts: 41
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Joined: May 04, 2002
Location: California, United States
Posted: April 27, 2016 at 6:30 PM / IP Logged Link to Post Post Reply Quote nbahoopstar
nbahoopstar wrote:
I have 18.65 volts incoming to the inline fuse under the hood. On the output side of the same fuse under the hood, my meter (and amp power) read 1.02 volts.
My H/U displays but no sound of any kind. I have tested and replaced the power amp fuse under the hood without any change.In line Fuse voltage to amp -- posted image.
Sorry I fat fingered my message above. I have 13.65-13.78V on the incoming side of the fuse but only 1.0 V on the outgoing side of the fuse to the amp.
Loud Subwoofers only, do not make a quality car audio system, especially when they are worth more than your "car"
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