Power loss at amp...

[Ty1erG]

Using a multimeter at the amp ground and power terminals vehicle running I get 7 volts, if I remove the power cable and measure it still using amp ground terminal I get full power(13 volts). I ran a test lead directly from battery to amp and got full power as well. So that tells me that the ground is good and the issue is in the power cable. Is that correct, if so what should I be looking for? I have an inline breaker between the amp and battery but no other junctions. I also ran a jumper from the breaker to amp to rule out a faulty breaker

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[1aespinoza 10+ year member]

I ran a test lead directly from battery to amp and got full power as well

Did you connect the test lead into the amp for the test?

 

[Ty1erG]

Did you connect the test lead into the amp for the test?

Yes, I hooked it up in place of the power cable

 

[1aespinoza 10+ year member]

Yes, I hooked it up in place of the power cable

When all wiring is ok, it is usually a bad amp when there is a voltage drop. Test the amp right next to the battery.

 

[Ty1erG]

When all wiring is ok, it is usually a bad amp when there is a voltage drop. Test the amp right next to the battery.

I replaced the amp already. Do you mean test amp next to batt, so basically with a short wire?

 

[huberoy123 10+ year member]

Did that solve your problem?

 

[Ty1erG]

Did that solve your problem?

Replacing the amp? No

 

[metalheadjoe 10+ year member]

What does your alternator put out? Measure voltage at the battery with the vehicle running. Your engine will stall before your voltage dips to 7v.

Where in ND are you? I could help you out if you want.

 

[Ty1erG]

What does your alternator put out? Measure voltage at the battery with the vehicle running. Your engine will stall before your voltage dips to 7v.

13.7 volts at the battery, and at the power cable. But when I put the cable on the amp and measure it is when it drops. But only drops at the amp, still have 13.7 everywhere else

 

[1aespinoza 10+ year member]

I replaced the amp already. Do you mean test amp next to batt, so basically with a short wire?

Yes. That will determine if the power wires are good. If you get a drop next to the battery, then the amp is bad.

 

[Ty1erG]

Yes. That will determine if the power wires are good. If you get a drop next to the battery, then the amp is bad.

Ok, gonna try it now

 

[Ty1erG]

Fixed it! Owner had a cheap inline fuse holder that was hiding below the battery tray, one side of it was just barely hanging on. I completely removed it since he also had a circuit breaker and cleaned up the connections...now he is back in action and pissing off the neighbors lol. Thanks everyone for your input and advice!!

 

[1aespinoza 10+ year member]

connections...now he is back in action and pissing off the neighbors lol

"Rock & Roll ain't noise pollution."
-AC/DC

 

[audiobaun 5,000+ posts]

Fixed it! Owner had a cheap inline fuse holder that was hiding below the battery tray, one side of it was just barely hanging on. I completely removed it since he also had a circuit breaker and cleaned up the connections...now he is back in action and pissing off the neighbors lol. Thanks everyone for your input and advice!!

Nice find. Generally always an issue at a Break /Spliced area. Ikeep approx. 4-6 inches of wiring on each side of a main Fuse to refresh to Clean wiring when needed. Pretty much Maintenance, and check all connections 2-4 times a year