using dmm

[jrwalte 10+ year member]

A DMM can do what a voltmeter does and much more. Where exactly did you place the prongs of the DMM?

And a DMM wouldn't have caused your sub to stop working. You need to double check your wiring. Something probably isn't connected right.

 

[liljojo4711 10+ year member]

i placed the red prong in the positive terminal and the black in the minus terminal. i got it all adjusted now, i just cant get any sound and its really pissing me off... i have a feeling its something with the amp but i dont know why.

 

[liljojo4711 10+ year member]

so i cant mess anything up by playing a 50hz signal and placing the dmm plugs anywhere??

 

[jrwalte 10+ year member]

Not unless you disconnected/connected any live wires to cause a short while doing it.

 

[liljojo4711 10+ year member]

what if that happens

 

[Haunz 10+ year member]

y isnt my sub hitting now? i hooked the wires back up and its like it isnt getting any power.

probably because the tutorial you read gives a totally backwords way to set gains..

 

[jrwalte 10+ year member]

You could have popped a fuse on your amp or worse. Use your DMM on the continuity test option and touch it to both ends of all your fuses. If any fail, replace them. If they're all good then I'd try installing it in another person's vehicle if you have access to one to rule out your wiring as the problem.

 

[jrwalte 10+ year member]

probably because the tutorial you read gives a totally backwords way to set gains..

I didn't even look at the question that way //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

OP, are you saying your sub isn't working at all or its output is really weak?

 

[liljojo4711 10+ year member]

sub isnt working at all

 

[jrwalte 10+ year member]

Then continue with my suggestions

 

[liljojo4711 10+ year member]

should the dmm beep when i touch both leads to each end of the fuse

 

[jrwalte 10+ year member]

yes.

 

[liljojo4711 10+ year member]

ok then all my fuses are good

 

[liljojo4711 10+ year member]

is there a way i can check the amp to see if i messed something up inside? what would i look for?

 

[jrwalte 10+ year member]

Not much you can do externally to determine if something in the amp has blown. You may be able to smell something burnt.

You could touch the dmm in DC mode to the power/ground to ensure voltage is reaching the amp and with the stereo on, touch the remote wire with pos and amp ground with neg to ensure your HU is sending the remote turn on signal.

To test to see if it is your RCAs, get a MP3 player and connect it to the RCA input of your amp. With your stereo on (volume can be off), you should be able to hear the MP3 through your sub.

If these check out I'd turn it to AC mode and with music playing somewhat loud I'd touch the speaker pos/neg. If the amp is blown I don't think it would send voltage to the speaker outputs.

If all those check out then I'd look to verify you have the speaker wired correctly.