I just took my pioneer head unit in to be serviced, I had alt whine and am pretty sure the head unit is to blame. Apparently they have a small internal fuse that is very easy to blow. My questions are: 1: The head unit is grounded to factory harness ground. Some people never have a problem with this some do. I did an ohm check and rad near zero ohms. Should I change it? And to where if I do? I checked all the metal I could find in the dash and none is common to ground so I would have to run one some distance. 2: People have suggested ground the head unit chassis as well. Is it needed? Same place as internal ground? 3: I've heard that the fuse can blow if your amp tries to ground through rca's. How can I make sure that this is not the case. I've checked with a DMM and get readings of near 0 ohms from amp ground terminal to frame. I've used a seat bolt, again some people say it's fine others are against it. Is there anything else I can meter to ensure the pico fuse won't blow again. 4: I think that one of my amp mounting screws could be touching metal, grounding the chassis. Is this a problem? Sorry for the long post wanted to get all the info in. Thanks for any thoughts on the matters.
i used to have some old phoenix gold amps in my truck and one or two of the mounting screws were into the metal of the floor board and it caused some hella whine from that amp. screwing down a small piece of wood then screwing the amp to that stopped it cold.
yeah it's on a board already but I just remembered that one of the bolts that the board is attached with touches the amp chassis. On another note the stereo shop called. It is not the deck even though grounding the rca shield made the noise go away. Obviously it's something with a ground. Any ideas.
