Hi, I am planning to install a newer car deck/head unit for my 1990 nissan 240sx, it already has a older panasonic deck. So when I took a look at the wiring harness I realized that from the deck to the after market harness there exists a black ground wire, and from the after market harness to the factory harness there does not exist a black ground wire, this means that the after market black ground wire is not really connected to anything through the factory harness, the older deck works fine. I was wondering when I install my newer deck, do I need that black ground wire, will it cause any problems if i keep it like that?Thank you.
well the ground wire provides displacement for the power going in the antenna will act as a grond thats why the old deck works but it wont provide good power also running a bigger power wire will give you better perfomance out of the decks amplification system
it is likely the old units chassis slides into a metal frame, that is a chassis ground, that or like gordy sayz thru the antenna, he all so went on to say you need to find anything metal to ground, look for a screw or drill a hole, make sure the paint is scraped off, the new unit may have a connection to put a screw thru if not u have to attach one, make sure the screw is turned down tight to have as much contact to the cars metal as possible. avoid extending the ground wire, buy a multimeter for less then 20.oo to test wires it is a good investment for a diyer.
Yes it will need a ground, you can hook a wire to anything solid metal under the dash for ground. Also the reason it works is because they are naturally grounded through the antenna plug.
