Need help - no sound out of my new subwoofer

[dman4486 5,000+ posts]

is the bolt green?

 

[VTLexus 10+ year member]

is the bolt green?

no the bolt is silver. its the bolt that the car came with to hold the stock amp down to the trunk metal. the ground terminal is not on the car chasis, it is on the metal latch of the factory amp.

so it is car metal --> metal latch of stock amp --> ground terminal --> silver bolt

 

[dman4486 5,000+ posts]

no the bolt is silver. its the bolt that the car came with to hold the stock amp down to the trunk metal. the ground terminal is not on the car chasis, it is on the metal latch of the factory amp.
so it is car metal --> metal latch of stock amp --> ground terminal --> silver bolt

give the direct to battery idea a shot and see what happens....more diagnosis after

gnight

 

[VTLexus 10+ year member]

ok...will try those 2 things in the morning, ill keep u all posted.

for anyone that cares, the "metal latch" i refer to on the stock amp is on the right side of this picture.

 

[VTLexus 10+ year member]

that means the bolt is not a good ground.....run a set of jumper cables from the batt negative to the end of the ground wire and see if the amp turns on....my bet is that it will
if this works, then you need to find a much better ground

so i did thsi and the amp turns on (it turned on the old way also), but still nothing out of my subwoofer.

im starting to think it might be the way i spliced the audio signal or something with the LOC? i dont know how to test those two thigns though, and it's very hard to reach those wires.

 

[dman4486 5,000+ posts]

so i did thsi and the amp turns on (it turned on the old way also), but still nothing out of my subwoofer.
im starting to think it might be the way i spliced the audio signal or something with the LOC? i dont know how to test those two thigns though, and it's very hard to reach those wires.

can you get a pic of the loc?

edit: and wiring

 

[VTLexus 10+ year member]

can you get a pic of the loc?

edit: and wiring

take a look at the thread over here. i uploaded a bunch more pics, and tehy are easier to see.

http://www.clublexus.com/forums/showthread.php?p=3605792&posted=1#post3605792

let me know if u cant see them

 

[dman4486 5,000+ posts]

from all you have done, the only thing I can come up with is to check that you spliced the correct wires, make sure the input sensitivity on the loc is up, and the gains on the amp are up

be sure you plugged the rca's into the correct set of rca out on the loc and rca in on the amp

you can test the signal into the loc by setting your dmm to vac and turn on the hu with the volume up. one lead on + and the other on - for A channel, and the same for the other channel

same applies for signal out of the loc! set dmm to vac and a lead to the center pin(rca) and a lead to the shielding

 

[VTLexus 10+ year member]

what does "dmm to vac" mean?

 

[dman4486 5,000+ posts]

what does "dmm to vac" mean?

digital multi meter and volts alternating current

 

[sonic purity 10+ year member]

from the pics, it look like you spliced the wires from the wrong side

 

[VTLexus 10+ year member]

from the pics, it look like you spliced the wires from the wrong side

what do you mean the wrong side?

 

[dman4486 5,000+ posts]

what do you mean the wrong side?

wrong side of the plug

edit: the side that goes to the factory amp instead of the side that goes to the hu

 

[VTLexus 10+ year member]

here is the update. i removed the LOC and just ran speaker wires to the amp. unfortunately the sub still did not kick. at this point im out of ideas. here is a summary:

- 12.6V at the input to the amp (from battery)

- 12V at remote (direct from battery connection on amp)

- ground wire at amp connected to negative terminal of battery via jumper cables

- Amp powers on

- tapped wires have AC voltage before LOC, no signal apparent on RCAs after LOC

- LOC removed - ran speaker wires into amplifer - still no subwoofer sound

- stock sub still works (tapped stock sub wires)

- Equipment Functional - amp powers a friends subwoofer in his car. and his amp powers my subwoofer in his car.

- polarity of tapped wires, polarity of inputs into amp, and polarity of inputs into terminal cup on subwoofer all double checked OK.

I think I'll just take my car somewhere and have them fix it...

 

[Jando86 10+ year member]

what model amp and subs (VC confic) do you have?

read the coils w/ a dmm (ohms). then read the output of your amp with a DMM as well.