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Add XM to existing Navi antenna?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=74162
Printed Date: May 16, 2025 at 4:46 AM


Topic: Add XM to existing Navi antenna?

Posted By: 95_4X4Runner
Subject: Add XM to existing Navi antenna?
Date Posted: March 08, 2006 at 6:36 PM

I recently purchased an '03 Acura CL-S with the OEM Navigation System and On-Star.  I'm adding an XM Commander on Friday, and I would like to splice into the existing GPS/Onstar antenna for the XM signal instead of adding another external antenna. I already have located the wiring pinout for the Nav unit in the trunk, and I know where the GPS signal goes into the unit.

Does anyone know if I'll be able to receive XM using the existing GPS Nav antenna signal? Curious to see if there's anyone out there who may have tried this.

Thanks,

Rob



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95 4Runner SR5 Several Mods
04 Honda Accord EX 5 speed
03 Acura CL-S 6 speed Navi



Replies:

Posted By: sparkie
Date Posted: March 08, 2006 at 7:11 PM
It won't work. The Nav antenna is completely different than the antenna used for the XM unit. All you will do is trash the GPS antenna. Each unit MUST have it's own antenna or be antenna which combines the three antennae into one piece. You may want to check with a dealer if they have such an antenna for your car. If not you will have to add another antenna.

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sparky


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