I know i have been asking alot of questions on here lately and i promise this is the last one. Ok.. I have heard that you need to ground all your electrical items at one spot. I have a wire in my dash that came from the factory which is Chassis Ground, it even says it on the wire. There is also a wire named Radio Ground. Now I have hi to Low RCA adapters which require a ground and i plan on tying it to the CHASSIS GROUND. Should i disregard the wire named radio ground and just ground it to hte chassis ground wire also. And my amp also needs a ground so should i send a wire from behind the seat "where amp is at" to the CHASSIS GROUND in the dash or could i just ground the amp where it is at. I was planning on grounding it on the bolts which holds the seat down. Then i heard that you must ground all electronics at same place. So should i send all my grounds to that one Chassis ground in dash or what. This CHASSIS GROUND is a factory wire which is in the factory stereo wiring harness. And i even looked at my wiring diagram and it shows both grounds, the RADIO GROUND and the CHASSIS GROUND. Thanks for all your help and hope you can help me one more time...thanks

 

They say you are supposed to ground in one spot to eliminate ground loops. It is not mandatory. I would gound the deck through the harness, your adapters to the same place, and the amp would be fine to the seat bolt. On an amp, it is more important to have a short ground wire (2-3feet). I would try it this way and see if you have any odd noise (you probably won't).

I in only one system grounded everything in one place and it didn't help. My main cause of noise was the use of cheap patch cords.

Hope this helps.

 

I'm looking at my PPI manual for the PC2350 2800 watt amp. It suggests grounding to the battery as well as the chassis and shows a picture describing this. The important thing to remember is that amps must have an 'easier' path to ground. In other words, the resistence of the path to ground must be LESS than the resistence of the path the positive.

In most cases, guys use the same wire for the positive feed into the amp and the ground. If this is the case, then a shorter ground wire is required. This would amount to about 6ft shorter to see any appreciable difference in resistence of wires. That is why it is a rule of thumb to run a 2 ft ground wire. However, if you use the required wire for the positive connection and then use a bigger wire for the ground back to the battery, I would consider all rules satisfied.

One thing I always do is, run the RCA's down the middle of the car, the power wires on the battery side and the speaker wires on the other side. Nothing interferes with anything this way.

 

I would also avoid using the seatbelt bolts as a grounding point, it's an easy spot to use because the hole is drilled....
but


"The seat belt bolts are rarely a good place to ground your equipment. Sometimes there will be a thick tar like substance (used for waterproofing) that will prevent you from getting a proper ground. Even if there is no sealant, the connection may be less than perfect because the hardened steel seat belt bolts (relatively high resistance) go into a hardened steel nut that's pressed into a piece of stamped steel that's spot welded to the bottom of the vehicle (not exactly a great electrical connection). "
http://www.eatel.net/~amptech/elecdisc/caraudio.htm



good luck