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Had the weirdest thing happen today while driving my 2003 maxima se. I had heard some popping in the speakers when listening to the radio and then after a few minutes, i made a left turn and heard a loud pop and now my head unit doesn't play any sound either from tuner or CD. Though i do still hear the "boop" sound when i try to adjust the bass/treble, etc. I disconnected the amp and did not hear the boops anymore when adjusting bass/treble, so i'm thinking the amp is not the problem. Any thoughts? Also, for years i have been hearing what sounds like a sprocket rattle while cruising about 40mph and the rpm's around 1800. Is that a sprocket in the timing chain area?
Thanks, XXXXX XXXXX it really be the amp if i still hear the beeps when i adjust bass/treble/balance/fader, etc? If the amp was truly bad, i would not expect to hear this.
Are these beeps coming from the audio speakers?
Yes, they are coming from the speakers.
Thanks Pete. But i was hoping for a bit more troubleshooting before arriving at this conclusion. For example what fuses and relays can I check. Should i put a volt meter to the amp wireharness to help me narrow down the source of the problem? I knew coming into this that it was either the headunit for the amp and as you can see from my original message, i was fairly certain it wasnt the amp. Much appreciate the help. Any way you can forward this onto Rick for his perspective given he has a long history with nissans and this may be a problem he's seen before?
Hi again Pete,
Were you able to refer this question to Rick? I haven't heard back from anyone.
Thanks for responding Jay. No popping when i start the card. All radio lights work as do all functions - just no sound. The steering wheel controls work fine as well. The only function of the radio that is not working any longer is the RDS.
What i've done so far is unplug the harness from the amp that is undermounted to back deck in the trunk (my entire system is factory). When i reconnect the harness (when the radio is on), i hear a "THUMP" from the speakers, which i presume is normal and indicates the amp is working properly, but i could be wrong. I also hear the "beeps" through all speakers when i use the bass/treble/fader/balance controls....another reason i think the amp is not the problem. But again, i'm no expert.
I dont have a test light, but can easily get one. I have pulled a few fuses out and visually checked them. Is that good enough? I think i saw a reference to an 'amp relay' or a signal that is sent from the head unit to the amp. Can i check that at the same time i check the fuses?
Thanks. I think I do have a test light at home. I will check tonight when i get home and let you know.
Ok so i couldn't find my test light so i used a volt meter.
56 measures 2v when there is no key in the ignition
67 measures about 9v when the key is in acc position, but zero when there is no key.
Keep in mind, I do hear the "beep" through the speakers when i adjust bass/treble/fader/balance, etc so i think the amp is working and if any speakers were shorted, i wouldn't hear the beeps. I just dont hear anything from tuner (AM or FM) or CD. have never used the tape deck.
Ok with amp unplugged and key in acc position, 67 reads 9.86v (same as before).
Battery voltage is about 10.9v. That's definitely low.
Car starts right up. Battery voltage with car on = ~11.5v. 67 voltage with car on and amp unplugged also = ~11.5v
about 11.5v with the car running.
hmmmm I just had a new alternator installed in 2010 and the battery in 2012.
Ok with all of that on, voltage measures about 10.5v.
Thanks Jay. I'm taking my car into the shop for an oil change on Friday anyway, so i'll have them check the alternator. I'll let you know.
Just wanted to give an update. Last weekend i removed the radio to see if i could see anything noticeably wrong such as a wire harness having come loose or something. Well, when i brought it inside and placed it on the kitchen table, I was able to immediately diagnose the problem. Apparently my 3 year old has gotten into my car and put my toll change (about $0.89) into the cassette opening in the radio. My guess is when i turned left and the speakers cut out, that the change rattling around in the system shorted something out (though I couldn't hear the change what the radio was mounted.
Time to look on ebay for a replacement. Thank you for all the help with this problem. I look forward to reminding my son and future grandkids about this for many many many years.