alternator questions!!!

[NJ201CB7]

hey guys i got a few questions

1. sometimes when i step on the break the lights like dim or flicker and my radio shuts off then goes back on often

2. it is sending a humming sound thru my sub

3. cud it b the alternator or can it be somehting else, i mean the radio never gave me problems, or this humming noise that i am hearing please help ASAPP

[fatboy1185]

I'd check all your grounds and freshen them up.

[drummersteve7]

are your rca and power cables run on the same side of the car?

[JDMDriver]

Switch off your stereo and drive around in it again.

Observe if it still does the same thing.

If not its most likely to be your stereo or your wiring (particularly if your stereo has just been installed).

If the stereo has been installed for a while or the lights still fade (with the stereo off or disconnected) then theres a good chance its not the wiring or stereo.

In this case it could be your alternator not copeing anymore with the power requirements or your voltage regulator may be starting to malfunction.

[JDMDriver]

If you cant switch off your amp (as it has no switch and is wired directly to the ignition +ve) then either remove the fuse or your going to have to remove the wire loom going into the amp.

This would remove your amp and stereo from the equation and isolate the problem to exclude your mod.

[91kid]

I had the same issue my crank pulley had seperated and th alt wasn't spinning. What is your voltage with car running at the battery??

[NJ201CB7]

I had the same issue my crank pulley had seperated and th alt wasn't spinning. What is your voltage with car running at the battery??

how would i find that out, ?? and also for everyone else i do unplug the sub bc u cant shut it off and the humming stops BUT the lights still flicker wen i hit the break or the radio still will shut off

[91kid]

Take a multimeter and put one probe on each battery terminak when your car is running... should be at 13-15V

If not your alternator is malfuntioning which is what it sounds like

[NJ201CB7]

yea i personally think it is that due to the lack of power being kicked out to run everything.. and the lights flickering and all that

[albinomexi]

Check the amp power cable. That shit happened to me a couple of months ago. Everything dimmed in my car. I have projectors, a new panasonic HU, a eockfrd punch 1200 and 2x 12 running as well as a power inverter when I play xbox in the car when I'm bored as hell doing nothing.
The power cables and the ground fucks everything up. Also make sure your stereo is hook up correctly from the back (the ignition and backup). Sometimes people hook em up wrong. Other than that, I redid my car's wiring to 0 gauage for further upgrades