Ground wire through harness?

I know a body ground is ideal, but it looks like the factory harness has a ground running through it. Can I use it, at least to test that my new head unit is working properly?

I recently bought a Pioneer HU from Amazon. The retail packaging came damaged, but I decided to try the install anyway. It will not power on, but I want to rule out any dumb stuff on my end before I try to return it. I just want to make sure the harness ground is ok as there isn't an easy access point to ground to the body. Thanks!

 
I know a body ground is ideal, but it looks like the factory harness has a ground running through it. Can I use it, at least to test that my new head unit is working properly?
I recently bought a Pioneer HU from Amazon. The retail packaging came damaged, but I decided to try the install anyway. It will not power on, but I want to rule out any dumb stuff on my end before I try to return it. I just want to make sure the harness ground is ok as there isn't an easy access point to ground to the body. Thanks!
Yes you CAN. It will work, but a direct to good ground is best. I had abnormal amp heating when I used a chassis ground so I had my installer guy install a 0AWG ground cable to the Neg post of my battery, complementing the 0AWG Pos 12V+ cable run to my battery. Alleviated the abnormal amp heating problem I had but I can't for the life of me figure out or imagine why!

John Kuthe...

 
Yes you CAN. It will work, but a direct to good ground is best. I had abnormal amp heating when I used a chassis ground so I had my installer guy install a 0AWG ground cable to the Neg post of my battery, complementing the 0AWG Pos 12V+ cable run to my battery. Alleviated the abnormal amp heating problem I had but I can't for the life of me figure out or imagine why!
John Kuthe...
2 different item, ass

 
Kuthe, shut up.

OP, I see a lot of people saying to run a new separate ground for the head unit. That's all good and everything and is a great idea. Personally, I have always just used the ground in the factory wiring harness and luckily haven't had any issues doing so. But if you are having power issues you might want to test it first.

 
Good luck with THAT! ;-)
John Kuthe...
Well you need to learn to shut up instead of giving useless or wrong information to people trying to learn. Look through all your PHDs, you probably already learned it but forgot.

 
Well you need to learn to shut up instead of giving useless or wrong information to people trying to learn. Look through all your PHDs, you probably already learned it but forgot.
My PHDs are sounding fantastic, thank you very much!! :) And I am just telling what empirical EVIDENCE I learned, and the conditions of that evidence!

John Kuthe...

 
Ok, thanks guys. I guess I'm going to check the continuity of the universal harness and the stereo harness and make sure I didn't screw up my connections, but I don't see how I did. Looks like I will be exchanging it.

 
Ok, thanks guys. I guess I'm going to check the continuity of the universal harness and the stereo harness and make sure I didn't screw up my connections, but I don't see how I did. Looks like I will be exchanging it.
I checked the resistance between the chassis ground I was using and a 4AWG jumper cable I'd clamped to the neg post of my battery and got a reading of 0.3 Ohms which seemed weird to me, that's almost 0 Ohms which is what such difference should be. But the subsequent absence of amp overheating without even being driven to produce an amplified signal was evidence enough for me that the OAWG dedicated ground to the neg terminal of the battery was a better ground than the chassis ground I'd selected which caused the amp to overheat!

John Kuthe...

 
I checked the resistance between the chassis ground I was using and a 4AWG jumper cable I'd clamped to the neg post of my battery and got a reading of 0.3 Ohms which seemed weird to me, that's almost 0 Ohms which is what such difference should be. But the subsequent absence of amp overheating without even being driven to produce an amplified signal was evidence enough for me that the OAWG dedicated ground to the neg terminal of the battery was a better ground than the chassis ground I'd selected which caused the amp to overheat!
John Kuthe...
Holy f u c k! No one gives a f u c k what you did!

 
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