Reply to thread

Message

<blockquote data-quote="jfmusic" data-source="post: 8824179" data-attributes="member: 687545">I have a 40-year-old car. For the last six months, since I installed a new stereo and amplifiers, the car was quiet. All was good.added LED bulbs through the car.Still all quiet.I found I was having a voltage drop under the dash and went through my harness, looking for bad connections. Found a few.Including the ground wire at the battery connector terminal was loose.I drove and found major noise and Alternator whine rpm affected. (voltage back up to 13.8-14.2)More complex:Major noise with key on and engine not running.I put a separate power and ground to the head and amps. And it was quiet.I turn the key on and it scrams noise. Car not running just in on position.&nbsp;I started disconnecting everything from the coil back looking for an ignition point being the problem. Made no difference.I installed New 12Ft RCA triple shielded from Head to Amps. No Fix.Moved the RC Amp Feed to the other side of the Car. No Fix.I found your threads on noise here and added the ground around the Rca&#039;s and attached to a solid OEM ground point by the radio.Didn’t fix.I tried adding PAC noise filters NSI-1&#039;s Didn’t FixAdded snap around the wire chokes on the Posi wire Didn’t fix.Suggestions, please.Thank you in. advance</blockquote>

[QUOTE="jfmusic, post: 8824179, member: 687545"] I have a 40-year-old car. For the last six months, since I installed a new stereo and amplifiers, the car was quiet. All was good. added LED bulbs through the car. Still all quiet. I found I was having a voltage drop under the dash and went through my harness, looking for bad connections. Found a few. Including the ground wire at the battery connector terminal was loose. I drove and found major noise and Alternator whine rpm affected. (voltage back up to 13.8-14.2) More complex: Major noise with key on and engine not running. I put a separate power and ground to the head and amps. And it was quiet. I turn the key on and it scrams noise. Car not running just in on position. I started disconnecting everything from the coil back looking for an ignition point being the problem. Made no difference. I installed New 12Ft RCA triple shielded from Head to Amps. No Fix. Moved the RC Amp Feed to the other side of the Car. No Fix. I found your threads on noise here and added the ground around the Rca's and attached to a solid OEM ground point by the radio. Didn’t fix. I tried adding PAC noise filters NSI-1's Didn’t Fix Added snap around the wire chokes on the Posi wire Didn’t fix. Suggestions, please. Thank you in. advance [/QUOTE]

Verification