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<blockquote data-quote="Twista89" data-source="post: 4436392" data-attributes="member: 578416"><p>OK well out of the blue I just started having ground loop issues. I am in college taking finals so I cant go out and try to find the problem right now. Saturday my friend bought a amp for his car and we tested it in mine since I already had wires running and after everything was done I went to rehook up my RCAs and swaped one while the HU was on but as soon as I did that I remembered it wasnt good to hot swap RCAs on my 6900UB. So I shut down the HU and continued to figure out which channel was which turning the car on and off. After that I drove on a 2 and a half hour drive back to my college and everything was great no ground loops the entire trip. Now I go to turn my car on yesterday and the music played good for the first couple of seconds and then out of no where I&nbsp; get alternator whines. I was wondering is it possible to still blow the fuse even though everything was fine on the trip back or can it blow at anytime. Also is it ok to use speaker wire such as 14 AWG to ground the back of it and what do I do with the 3rd set of RCAs on the back of the HU. These are not directly on the back of the HU but connected to it from a cord...How do I ground this one.</p></blockquote><p></p>

[QUOTE="Twista89, post: 4436392, member: 578416"] OK well out of the blue I just started having ground loop issues. I am in college taking finals so I cant go out and try to find the problem right now. Saturday my friend bought a amp for his car and we tested it in mine since I already had wires running and after everything was done I went to rehook up my RCAs and swaped one while the HU was on but as soon as I did that I remembered it wasnt good to hot swap RCAs on my 6900UB. So I shut down the HU and continued to figure out which channel was which turning the car on and off. After that I drove on a 2 and a half hour drive back to my college and everything was great no ground loops the entire trip. Now I go to turn my car on yesterday and the music played good for the first couple of seconds and then out of no where I get alternator whines. I was wondering is it possible to still blow the fuse even though everything was fine on the trip back or can it blow at anytime. Also is it ok to use speaker wire such as 14 AWG to ground the back of it and what do I do with the 3rd set of RCAs on the back of the HU. These are not directly on the back of the HU but connected to it from a cord...How do I ground this one. [/QUOTE]

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