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motorola ihf1000 to pontiac monsoon?

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Forum Name: Cellular and Communications
Forum Discription: Cell Phones, Hands Free Kits, Bluetooth, Two Way Radios, CBs, Pagers, Wireless Internet, etc.
Printed Date: July 31, 2021 at 7:45 PM

Topic: motorola ihf1000 to pontiac monsoon?

Posted By: jvancamp
Subject: motorola ihf1000 to pontiac monsoon?
Date Posted: November 20, 2011 at 11:52 AM

I have a 2007 Pontiac Grand Prix with the Monsoon stereo system (amplified). I am trying to use my IHF1000 with a T-harness to install Bluetooth handsfree. I have used this same harness and Bluetooth package in a 2007 without the Monsoon (non-amplified)with no issues.

When the IHF1000 is connected to the Monsoon system the audio is excellent but when you end a call there is a loud pop coming through the speakers. I have tried using the low audio output and the high from the IHF1000 and even an isolator on the audio line. Nothing works.

Can anyone help me with a new idea to try?



Posted By: i am an idiot
Date Posted: November 20, 2011 at 12:43 PM
Did you add a relay?

Posted By: jvancamp
Date Posted: November 20, 2011 at 1:14 PM
I am using the GMCSS2 adapter cable to connect directly to the radio. This enables the cellular audio to come through the front speakers automatically. Not sure where I would use a relay. Can you give more insite?

Posted By: i am an idiot
Date Posted: November 20, 2011 at 2:04 PM
No reason to use a relay.  Just if you did add a relay for something, and you did not install a quenching diode across the coil of the relay, it would probably make a pop just as you are describing.  Is your device or harness designed for use with the monsoon system?  There are relays inside your device, if it is designed for an amplified system, it will have the neccessary diode.  If it is not designed for an amplified system, there is a good chance it does not have a diode across the relay(s).   

Posted By: jvancamp
Date Posted: November 21, 2011 at 7:21 AM
Opened up bluetooth module. No relays inside. But you got me thinking about spikes and what I ended up trying is 2 coupling capacitors in the audio line from the bluetooth to the radio. Worked great.

I didn't try this before because I did not see a change when using the isolation transformer. Anyway, good to go.

Thanks for the help.

Posted By: i am an idiot
Date Posted: December 04, 2011 at 7:53 AM
Glad you got it working.

Posted By: howie ll
Date Posted: December 15, 2011 at 4:49 AM
Craig, before the various adaptor leads came along, with externally amplified head units, we did one of three things:-
a) Feed one channel output to an in/under dash speaker, loads of old Nokia and Moto speakers lying around.
b) Go to the amp speaker outputs such as current Lexus IS models.
c) Most Euro head units use a quadplug/most from 2000, it has provision for mute and speaker = & -.
See diagram (might be useful for you):-generic_quadlock.gif

Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

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