Bariki Posted June 24, 2023 Share Posted June 24, 2023 Does anyone know a way to reduce alternator whine picked up by a Bluetooth transmitter? Obviously turning the volume down and not using the both AC help, as does driving slower… Playing music instead of podcasts or audiobooks has a similar effect. But us there anything else I can do? Link to comment Share on other sites More sharing options...
Code Posted June 24, 2023 Share Posted June 24, 2023 The Big Three may help "Striving to better, oft we mar what's well." - Bill Shakespeare - car modder Link to comment Share on other sites More sharing options...
m sprank Posted June 24, 2023 Share Posted June 24, 2023 7 hours ago, Code said: The Big Three may help Or just cleaning up the OEM grounds on a 18 year old car. What is powering the BT transmitter? Link to comment Share on other sites More sharing options...
Bariki Posted June 25, 2023 Author Share Posted June 25, 2023 19 hours ago, Code said: The Big Three may help The big three what? Plugs, wires, and grounds? Link to comment Share on other sites More sharing options...
Bariki Posted June 25, 2023 Author Share Posted June 25, 2023 11 hours ago, m sprank said: Or just cleaning up the OEM grounds on a 18 year old car. What is powering the BT transmitter? I will give that a try. It’s plugged into the cigarette lighter. Link to comment Share on other sites More sharing options...
Code Posted June 25, 2023 Share Posted June 25, 2023 Negative. It’s a grounding mod/upgrade. Should be findable by search. 1 "Striving to better, oft we mar what's well." - Bill Shakespeare - car modder Link to comment Share on other sites More sharing options...
Enlight Posted June 25, 2023 Share Posted June 25, 2023 Another vote for the Big 3 grounding mod, that eliminated my whine as well. 1 muFreight.co A JDM Container Sharing Service from Japan to NYC Website | Instagram | Email Bessie II's Thread Link to comment Share on other sites More sharing options...
m sprank Posted June 25, 2023 Share Posted June 25, 2023 If using the OEM 12v "cigarette lighter" that is known to have a sketchy ground. Big three (alternator, battery, block) is probably easier than re-grounding the outlet. I would still check the OEM grounds especially the block straps to the frame rail. Make sure the chassis is GROUND. Use a multi-meter. 2 Link to comment Share on other sites More sharing options...
Enlight Posted June 25, 2023 Share Posted June 25, 2023 I didn't know that cigarette lighter was known to have bad ground, that's right where I plugged my bluetooth into. I used the cubby 12v. This video was very helpful when I started troubleshooting electrical issues. One thing I learned was to use a wire extension check ground from your component all the way to the battery. 1 1 muFreight.co A JDM Container Sharing Service from Japan to NYC Website | Instagram | Email Bessie II's Thread Link to comment Share on other sites More sharing options...
m sprank Posted June 25, 2023 Share Posted June 25, 2023 Ground path from 12v circuit travels through harness. Had plenty of complaints about burnt out phone chargers and the like. Started grounding circuit directly to chassis and 99.99% of problems solved. Not the most scientific study. 1 Link to comment Share on other sites More sharing options...
Bariki Posted June 26, 2023 Author Share Posted June 26, 2023 I cleaned a couple of grounds and the alternator positive connector, but it didn't make a difference. I get whine whether I use the 12v outlet or the cigarette lighter. It gets worse when you have the air conditioning on. It would be less of an issue if I didn't need to use so much volume to hear podcasts/audiobooks. With music, it's less of an issue since the base volume level is much higher, so you can barely hear the whine. Link to comment Share on other sites More sharing options...
Bariki Posted June 26, 2023 Author Share Posted June 26, 2023 Just found another ground strap and it’s greasy as… but accessing it will probably require pulling the undercover, so it will have to wait for another day… Link to comment Share on other sites More sharing options...
m sprank Posted June 26, 2023 Share Posted June 26, 2023 Take a good gauge wire (like a 0 or 1) and connect it to the battery ground and the chassis. Clean any paint or debris prior to securing to the chassis. Should be a strap in each side of the block to the frame rail below and many times they get damaged. Link to comment Share on other sites More sharing options...
Dishwasher Posted June 26, 2023 Share Posted June 26, 2023 Those ground straps to the heads always wear out. Replaced them with 10 awg copper and problem solved when I had this issue. Worth doing whether or not you have the audio whine. Some folks speculate that the grease on the throw out bearing deteriorates due to bad grounding causing arcing. Brought to you by Pfizer Link to comment Share on other sites More sharing options...
m sprank Posted June 26, 2023 Share Posted June 26, 2023 29 minutes ago, Dishwasher said: Some folks speculate that the grease on the throw out bearing deteriorates due to bad grounding causing arcing. Hmmm. I should have jammed a scope down through the inspection cover and made a video. If I could catch arc on video.... Link to comment Share on other sites More sharing options...
NORULZleggy Posted June 26, 2023 Share Posted June 26, 2023 JDM DD for the Win. I had the same issue. pull the trigger on it. Link to comment Share on other sites More sharing options...
BoozeRS05 Posted June 26, 2023 Share Posted June 26, 2023 I’ve only ever added an additional wire from the negative battery terminal to the frame, which seemed to work great by itself EB's Subaru journal - 2005 LegacyGT Wagon & 2014 Forester FB25 (2008 specB - RIP) IG@legacygtliving Link to comment Share on other sites More sharing options...
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