I need help with whine!

[jtm087]

I searched through the 3 pages of alternator whine threads, but they all pertain to rca's and power cables. Here is my situation, I have a head unit and in dash screen with the grounds, 12v., and acc. wires wired together, I get an alternator whine only when the screen is connected, but not when just the head unit is hooked up... I plan on wiring a dvd player to these 3 wires to and I am assuming that this will make the whine even worse, what can I do about this whine??

 

[Tempe]

Well for starters the stock wiring was designed to handle the stock head unit. I will be honest and say I do not know the current draw of your DVD player and screen, but that right there might be exceeding plus your head unit might be exceeding what the wires are designed to handle. I would do the following:

1) Get a relay. Run this off the remote turn on wire on your head unit. From there you can then power on your DVD player, screen, amps, etc.

2) Upgrade your ground. I would suggest using a grounding point inside your dash instead of using the mystery ground wire included in stock wiring.

Tempe

 

[jtm087]

got a picture or place I can get this relay??

 

[Tempe]

12VDC BOSCH RELAY SPDT 30A $2.64

Just about every automotove parts store carries Bosch-style relays. Click on the wiring diagram, go to page 14, and magnify to 200%. For more in-depth research on relays, check out BCAE's page on relays.

Tempe

 

[jtm087]

Thanks!! Good info, onew question though...So i hook all the 12v, acc, and ground wires from all 3 devices to this one relay? or do I need 3 seperate ones? the diagram didn't say anyhting about multiple devices

 

[Tempe]

On the BCAE link it shows a great graphic about 75% of the way down. It's a Flash file so I can't just post the link to it. You can see how everything is run off of the #30 output. Run a female spade terminal to some 16 gauge wire. Then run it into some kind of fused distro-block. Then run a 16 gauge wire to each accessory or remote turn on input on your amp(s) and processor(s).

Tempe

 

[jtm087]

alright thanks very much

 

[DOZIER]

Dead Link Removed