Poor AM reception in H2 Hummer
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=73408
Printed Date: June 07, 2024 at 4:31 PM
Topic: Poor AM reception in H2 Hummer
Posted By: wrxsti161
Subject: Poor AM reception in H2 Hummer
Date Posted: February 24, 2006 at 9:43 AM
Recently installed an AVIC-N2 into a 2003 Hummer H2. There is really poor am reception. Anything I can do to help this? My antenna connections have been checked, and they are very solid. Only thing I can think of is the GM antenna adapter is causing some sort of problem. I would doubt the antenna has a problem being that its a fairly new truck. Any suggestions would help. Thanks!
Replies:
Posted By: audiophd
Date Posted: February 24, 2006 at 2:04 PM
try grounding the outer sleave on the antenna at the radio.
Posted By: CTOH
Date Posted: February 25, 2006 at 6:38 PM
Check the antenna connection under the passenger kick panel, like you said you could have a bad antenna adaptor,,,
Posted By: mad550
Date Posted: February 25, 2006 at 11:32 PM
I've had brand new antenna's be faulty so don't rule it out, the ground would be most likely.
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WOW Sight and Sound
Maroochydore
Nothing is impossible!
Do it right the first time or don't do it at all.
Posted By: sparkie
Date Posted: February 26, 2006 at 2:41 PM
Use a ohm meter to check the antenna's ground. The outer shielding/contact at the lead tip must have less than 1/2 ohm resistance to ground. Measure the continuity from the lead tip to the antenna mast. This reading should be the same as the first. The most likely cause is the antenna adaptor being faulty or incorrect. I am assuming the problem wasn't there with the previous radio. You can also clean the main battery to chassis ground at the driver's side of the front bumper. It is usually bad. It is visible through the front of the bumper.
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sparky
Posted By: kgerry
Date Posted: February 27, 2006 at 10:00 AM
it may also be an active antenna and need to be powered up..... just like the VW's
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: sparkie
Date Posted: February 27, 2006 at 1:37 PM
Now that you mention it kgerry, you are probably correct. There is a grey wire in the large radio plug in cavity B3 that, if there, requires 12 volts to turn on the antenna module while the radio is on.
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sparky
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