motorola hands free car kit
Printed From: the12volt.com
Forum Name: Cellular and Communications
Forum Discription: Cell Phones, Hands Free Kits, Bluetooth, Two Way Radios, CBs, Pagers, Wireless Internet, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=43650
Printed Date: May 14, 2025 at 5:45 AM
Topic: motorola hands free car kit
Posted By: tow-up
Subject: motorola hands free car kit
Date Posted: November 23, 2004 at 5:59 PM
I am installing a Motorola hands free kit in a 2004 Ford F-250. I have two questions.
There are two wires from the control box that travel with the postive and negitive. One is Green and is the ignition sense wire. It said it should be hooked to a source that will remain HIGH (not switched off) while the vehicle is cranking but will go low when the ignition is turned off. Does anyone know which wire would be best to use?
The second wire is Orange and is the entertainment Mute wire. The truck has the in dash 6 CD changer does anyone know what wire I should use from the radio?
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Damon H
Replies:
Posted By: tow-up
Date Posted: November 23, 2004 at 6:08 PM
Sorry this is a car phone installation
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Damon H
Posted By: tow-up
Date Posted: November 24, 2004 at 9:00 PM
BTT
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Damon H
Posted By: Hymer
Date Posted: November 28, 2004 at 12:02 AM
I think the blue/green in the ign harness will give you a your ign sense in the truck.. The mute however on the motorola used to go to ground when the phone rang.. it's been a few years but I am sure they still operate that way.. look up the wireing on this site and find the mute wire on the back of the deck.. check to see if it goes to ground when you push the mute button, if it does just tap in.. the other route I have gone is to use a relay to drop out the ign sense on your deck.. ie phone rings the org wire goes to ground, energizing a relay that cut the ign wire on your deck thus no sound out of your radio until the phone is hung up...
Hymer
Posted By: tow-up
Date Posted: November 28, 2004 at 5:25 PM
Thanks Hymer. The blue-green worked great. I will check the mute options.
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Damon H
Posted By: MJA1962
Date Posted: November 28, 2004 at 6:03 PM
I have found that it's better not to connect the green IGN wire on these units. The reason is that when the car is switched off, the phone will also shut off. Personally, I would not want to have my cell phone turn off simply because the engine is off. I think this is just a carryover from the days of installed car phones which stayed in the car all the time. If you want to try it out without disconnecting the wire that you already hooked up, the wiring harness should have a fuse that can be removed. -Michael
Posted By: Derek Vella
Date Posted: November 29, 2004 at 1:27 PM
red - permanent live black - ground blue/green - ignition orange - radio mute you would definitely be better off connecting the ign. wire as Motorola car kits are renowned for draining the car battery, you can connect to perm. live , but beware the consequenses. You only have to change the settings in the phone menu, so the phone will not power down. The easiest way to find the mute is, eliminate the live cables with a circuit tester, get a fuse holder with 1amp or at most 2, with a small lenth of wire and just groung it to the radio casing trying each wire until you find the right one, I only having a limited knowledge of U S vehicles, I'm not sure whether the radio has iso, quad lock or ford connectors, if there is a third plug on the back of the radio, not the power or speaker connectors, then the mute wire will probably be there, remember that the mute position may not have a wire connected to the plug
Posted By: Derek Vella
Date Posted: November 29, 2004 at 1:30 PM
oh yeah, just a quick PS you can use the ign. wire on the back of the radio
Posted By: MJA1962
Date Posted: November 29, 2004 at 1:47 PM
Derek Vella wrote:
you would definitely be better off connecting the ign. wire as Motorola car kits are renowned for draining the car battery, you can connect to perm. live , but beware the consequenses. You only have to change the settings in the phone menu, so the phone will not power down.
Derek, I wasn't suggesting connecting the green wire to permanent +12V, but rather leaving it disconnected altogether. I have had no problems installing 2 Motorola kits like this. Is there any benefit to connecting the green IGN wire? Also, it seems that some radios do not have a mute wire at all - my '05 Escalade for example. -Michael
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