i hooked my system up tonight and everything went fine then when i turned the key so the radio would come on i noticed an humming noise coming from the engine bay..it sounds to be coming out of somewhere in the middle part of the motor...car starts find and system works..i did unhook the power wire and it still has the humming noise..i dont have the cover and everythin back together beside the battery could this be why? someone help

 

also my volt gauge is reading 12 when the key is just turned on but not running

 

Try to put everything back together. Maybe its a little paranoia(I get that too after I do some sort of install)

 

i went ahead and put everything back together and the noise is still there

 

Hard to say with your explanation. If you can be more indepth about your install, maybe we can shed some light.

 

interested as well...subing

 

i first took it to best buy and had an line output converter hooked up then came home and unhooked my battery ran my rca cables remote wire and ground...then hooked my amp up and installed the fuse on the power wire and conected the power wire then conected the negative battery cable back..its just a slight humming and sounds like its comin from below the battery on the engine side

 

Hmm...since someone else worked on the car, there's really no telling what could have been done.

 

First off, the voltage should only be 12 volts (really around 12.6-ish) when the key is on, but the engine is not running. It should go up to 14.4-ish volts with the engine running.

The humming noise - I had that too and my assumption was that it was something to do with fuel (pump or something?). Maybe some type of calibration since the power was disconnected? I didn't hear it anymore after I drove the car for the first time after hooking the battery back up.

 

my volts are reading fine..i drove the car to school today which is bout a 45min drive and it ran fine sounded fine and didn't throw on any light but when i got home and turned the key on the noise was there again..what should i do now?.is it somethin i should take it to nissan and have them fix or????

 

Mine does the same thing as well, weird.

 

Perhaps the engine is on. Check the tach.

 

Na its not the engine, its coming from the alternator or fuel pump.

 

sounds like grounding noise

 

And how do I fix this?

 

so it should be ok for now?..but little **** like that will drive me crazy just bc i know its there so along with ZSpectrun how can i solve the problem