Bluetooth calling issue

JUSTIN HARTL

MEMBER
2011 GMC SIERRA
145,000 MILES

I installed an aftermarket stereo head unit. It is a Kenwood 5707s with Bluetooth and Android auto and Apple Car play. All of those features work great. When I make a phone call, or receive a call, nobody can gear me. It sounds like interference. I can be completely stopped and I can hear everything perfectly and so can the listener. Once my speed hits between 20-30+MPH, it happens again. The head unit is fully up to date and all connections are secure. My mic is installed within my driver side grab bar. Any suggestions I can try? All Bluetooth music and navigation works perfectly! Thanks!

4 Replies

BORIS K

MECHANIC
798 POSTS

Hello,

It sounds like your microphone cable might be picking up interference from an electronic device. I would suggest that you try and reroute the microphone cable away from any electronic devices and try again.

Is the call quality only bad while driving or also when the engine is idling when parked? Try to hear if there is a sound quality difference with the engine switched off and idling?
Also ensure that the ground connections of your radio are secure and that the wiring to the ground connections is sound

How to test wiring:

https://www.2carpros.com/articles/how-to-check-wiring

Please let us know how you get along.

Cheers, Boris

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Thursday, April 29th, 2021 AT 6:16 AM

JUSTIN HARTL

MEMBER
4 POSTS

Hi Boris, there is no difference in quality between the truck running or turned off. The only thing I haven't done yet is ensure my mic connection is tight. I have the wire running from the radio underneath the steering wheel, and up the driver side sidebar. I did test the mic for interference by tapping on it and that did not affect anything. I also have not tried a different phone. I am on an older Galaxy Note 8, but that should not matter. I have no other electronic devices except my phone which is usually in my shirt pocket when driving.

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Thursday, April 29th, 2021 AT 6:31 AM

JUSTIN HARTL

MEMBER
4 POSTS

Update as of 5-1-21. I can confirm that switching those does not work. I can hear them but they hear static. I do wonder something though. My truck originally had OnStar. I decided to bypass that feature when I purchased the wire harness. Anyone think I need to hook up the OnStar? As far as I know, I do not have a mic other than the one I installed with the radio.

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Saturday, May 1st, 2021 AT 4:35 PM

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi,

I noticed that it has been a couple of days since you have been contacted.

As far as the wiring harness that you used and bypassed the OnStar, I would try it. It was likely there for a reason.

Let us know if that takes care of the issue.

Joe

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Monday, May 3rd, 2021 AT 6:25 PM