Start with the Monsoon FAQ sticky. There are several ways to do it - all of which have been discussed countless times. 
XM External Input
Thread Starter
TECH Resident
iTrader: (13)
Joined: Jan 2006
Posts: 982
Likes: 1
From: Gainesville, FL
XM External Input I have the standard Monsoon CD head unit and also am running the XM radio. I currently use the RF modulator, but I keep having to switch stations as I drive due to interference. Has anyone here been successful in wiring an external jack to hardwire an accessory line a XM or iPod?
Copy & Paste Moderator
Joined: Apr 2002
Posts: 9,764
Likes: 208
From: Eastern MA
Unfortunately, the 1998 Monsoon CD Headunit cannot control the factory external CD-Changer, otherwise you can convert that port toi RCA-IN using a GM9-AUX like I did on my 2001.
http://www.fadingarrow.com/XMSatelliteRadio.htm
http://www.fadingarrow.com/XMSatelliteRadio.htm
Copy & Paste Moderator
Joined: Apr 2002
Posts: 9,764
Likes: 208
From: Eastern MA
Originally Posted by fredmr39
- as far as aux inputs, search posts by member 'Jason Novak'.
Joined: Nov 2003
Posts: 11,328
Likes: 344
From: Jacksonville, FL (originally from Toronto Canada)
I missed that it was a 98. Since you can't use the CD changer port adapters on a 98 CD head unit, the simplest and least expensive alternative is to replace the wireless FM modulator with a wired one. They install inline in the antenna lead and connect to the audio/headphone port on the satellite radio tuner. The advantage is that they electronically disconnect the head unit from the AM/FM antenna when the satellite radio is in use (and reconnect it when the satellite radio is off). That eliminates all the interference from broadcast stations in the area. And, because it is a direct connection into the antenna, it also eliminates the fading that is common with wireless modulators. Sound quality will be equivalent to that of a strong local FM station so it's not the same as CD but it's quite good and pretty inexpensive.
Thread Starter
TECH Resident
iTrader: (13)
Joined: Jan 2006
Posts: 982
Likes: 1
From: Gainesville, FL
[QUOTE=WhiteBird00]I missed that it was a 98. Since you can't use the CD changer port adapters on a 98 CD head unit, the simplest and least expensive alternative is to replace the wireless FM modulator with a wired one. QUOTE]
Sounds like great advice! This will be my next task. Thanks for all of the replys.
Sounds like great advice! This will be my next task. Thanks for all of the replys.
Trending Topics
Copy & Paste Moderator
Joined: Apr 2002
Posts: 9,764
Likes: 208
From: Eastern MA
Originally Posted by WhiteBird00
I missed that it was a 98. Since you can't use the CD changer port adapters on a 98 CD head unit, the simplest and least expensive alternative is to replace the wireless FM modulator with a wired one. They install inline in the antenna lead and connect to the audio/headphone port on the satellite radio tuner. The advantage is that they electronically disconnect the head unit from the AM/FM antenna when the satellite radio is in use (and reconnect it when the satellite radio is off). That eliminates all the interference from broadcast stations in the area. And, because it is a direct connection into the antenna, it also eliminates the fading that is common with wireless modulators. Sound quality will be equivalent to that of a strong local FM station so it's not the same as CD but it's quite good and pretty inexpensive.
Only headunits that could control the factory CD-Changer will work with the GM9-AUX:
1998-2002 Cassette
mid99-2002 CD (best bet is 2001-2002 CD since they supposedly can handle two AUX devices and no one knows exactly when in mid99 the change for the CD headunit to control the CD Changer happened-- the only way to tell in the mid99 is to disassemble it and check the P/N stamped on the CD player's circuit board)
Last edited by VIP1; Jun 22, 2007 at 01:05 AM.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Joined: Nov 2003
Posts: 11,328
Likes: 344
From: Jacksonville, FL (originally from Toronto Canada)
Originally Posted by VIP1
I can tell you from experience that a wired FM transmitter is only a marginal improvement over a wireless FM transmitter and nowhere near the quality of an AUX input solution. You'll still end up having to jump stations on occasion and you'll still get static on occasion. There were certain areas that I drove (not far from my normal route) where I would routinely get increased static and had to change stations.
