New 765T and Engine noise.
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16 years
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I had a 760 until one night some idiot broke my trucks window and ripped it out of the dash. The 760 was connected to my Alpine stereo's rear propriety ai-net connection with a AI-net to 3.5mm cable ($12.00 on ebay).
This cable was ran behind the dash and would let me play MP3's from the nuvi through the stereo. Worked great.
Now then, I replaced the 760 with a 765t. I bought a new ai-net cable because the old one was torn in half during the theft. It is a simple process to pull out the stereo and simply plug in the cable.
I have a 2500HD Diesel truck and when the engine is revved, I hear a bunch of engine noise from the speakers. Over the air radio and CD's sound fine but any MP3's played from the 765t are washed out by the engine noise. I can hear the engine wind up when I accelerate.
My thoughts are this is has to be 1) residual damage from the theft 2) a bad cable or 3) a bad nuvi.
I called my insurance company back and they want to send out a stereo company that specializes in this kind of thing to verify that the people that did the original repair (the original company said there was no damage to the alpine unit) did not botch this.
Any ideas on what might be the cause
does a mp3 player
How about a mp3 player plugged into the 3.5mm portion of the cable, does it do the same? if it does it would exclude the Garmin.
Using Android Based GPS.The above post and my sig reflects my own opinions, expressed for the purpose of informing or inspiring, not commanding. Naturally, you are free to reject or embrace whatever you read.
Engine noise
I had a 760 until one night some idiot broke my trucks window and ripped it out of the dash. The 760 was connected to my Alpine stereo's rear propriety ai-net connection with a AI-net to 3.5mm cable ($12.00 on ebay).
This cable was ran behind the dash and would let me play MP3's from the nuvi through the stereo. Worked great.
Now then, I replaced the 760 with a 765t. I bought a new ai-net cable because the old one was torn in half during the theft. It is a simple process to pull out the stereo and simply plug in the cable.
I have a 2500HD Diesel truck and when the engine is revved, I hear a bunch of engine noise from the speakers. Over the air radio and CD's sound fine but any MP3's played from the 765t are washed out by the engine noise. I can hear the engine wind up when I accelerate.
My thoughts are this is has to be 1) residual damage from the theft 2) a bad cable or 3) a bad nuvi.
I called my insurance company back and they want to send out a stereo company that specializes in this kind of thing to verify that the people that did the original repair (the original company said there was no damage to the alpine unit) did not botch this.
Any ideas on what might be the cause
You didn't say what kind of engine noise you are hearing. Since your truck is a diesel, it wouldn't be ignition noise. If it is a whine that changes pitch with engine speed then it is probably alternator noise. Have you hooked anything else up to the cable to see if that has the noise also?
Most likely the cause of your problem is a bad ground. The thief may have broken the chassis ground on your system and you no longer have all systems at the same ground potential. I'd take your insurance company's offer of someone else the check your system. If the insurance company is paying, what have you got to loose?
I Agree
It could be a bad ground.
Tom
I don't have any other
I don't have any other devices that plug into the stereo. I am sure some of my friends kids have something I can test this with.
Yes, the engine noise is a whine that will rev up as the engine revs.
Garmin Nuvi 765t
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Engine noise in electronics is typically indicative of needing a ground loop isolator in the power connection.
MM is on point
Engine noise in electronics is typically indicative of needing a ground loop isolator in the power connection.
This is a ground loop problem. The stereo and gps must ground to same point, if they ground at different points, the common link the stereo cord between stereo and gps is the problem.
Try a temporary stereo cord?
Try an mp3 player or cell phone to stereo?
Turned out to be a bad
Turned out to be a bad cable. The repair tech said that engine noise was not common on a diesel. I would imagine that any newer stereo they will have a factor 3.5mm port for connecting an iopd or whatever. My older Alpine with it's proprietary connection is a dying breed.
He pulled everything apart and made some tweaks to my cable and plunged it back in. Good to go.
Garmin Nuvi 765t