20 Most Recent Sony CDX-GT300 CD Player Questions & Answers

you might have a button stuck, try gently pulling the function button out a little bit. i used a sheet rock knife razor blade and was able to release it but after pressing the function button again it started all over again. good luck.

Sony CDX-GT300... | Answered on Apr 29, 2017

maybe bad ground wire behind radio cheers

Sony CDX-GT300... | Answered on May 12, 2014

Just connect together the solid blue wire on the main harness to the radio with the blue/striped wire. The blue wire is for the power antenna and the blue striped is for the remote amp. but if not connected together only the fm/am has outputs to the line output RCA jacks. I learned this through Sony's tech line and it works perfectly now.

Sony CDX-GT300... | Answered on Nov 15, 2013

If you punch up ur model number into google search you will find the diagrams u need.

Sony CDX-GT300... | Answered on Sep 02, 2013

check the sub works with known good signal from different source. if that works and all settings are double checked then you might try to reset the 300 series to factory reset. try to unplug from the 110 outlet then hold the on button down while plugging it back in this should re iniatalize the unit and if it still doesn't work you may have a hardware problem

Sony CDX-GT300... | Answered on Jun 20, 2011

Not finding what you are looking for?
Sony CDX-GT300 CD Player Logo

76 questions posted

Ask a Question

Usually answered in minutes!

Top Sony Car Audio & Video Experts

Larry Stiles
Larry Stiles

Level 2 Expert

301 Answers


Level 3 Expert

85239 Answers

The Knight
The Knight

Level 3 Expert

76376 Answers

Are you a Sony Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

Sony Car Audio & Video

  • Sony Car Audio & Video

Most Popular Question

39 ve got cdx gt300 series

  • Car Audio & Video