Speeding

If you put a switch on a cable from the cable antenna and handset to switch between the two … Would it work?

I do not want to use a module. The sound quality is not very good. I have been told that due to information (mpg, average speed, oil life, etc. ..) that shows, as well as the device anti-theft performance out of it, would have trouble switching my radio out. Is there any way to put a switch on the antenna cable goes in the back the stereo to switch between the two signals? 2007 Chevy Malibu .. I guess it would have been useful.

You can not just run a signal audio in an antenna jack and listen to the sound. You must be an FM radio signal. Sounds like you've been using a wireless FM modulator. Your best option is to upgrade a wired FM modulator. Here's an example: http://www.sonicelectronix.com/item_10478_Clarion+FM200.html This device converts the headphone output to a signal FM then connects directly to the antenna input of your radio. The FM antenna signal is cut vehicle when the device is on, so not interfere with sound quality. This puts an end to the constant static and interference, and the search for clear stations. This device does not require any installation. Usually, you connect it to the back of the factory radio antenna plug. This may not be necessary in your vehicle, due to new Malibu has crossover in the antenna line is more easily accessible behind the driver's end of the board. The device also need to be connected to a power. Another option is an auxiliary input adapter for your vehicle, but not cheap http://www.autotoys.com/x/product.php?productid=10374

Anti-flipping device for speedboats