the two questions you have just put in are in the category - Instant Messaging - a function of the Internet much used by young people. They will be better placed in the Vehicles - Cars section.
Your question about the light on your dashboard sounds serious to me - best to include the make & model of your car.
As for your car radio question - this one - it will help to include the make and model of car & or radio and the most important piece the radio serial number.
Good luck...
Peccavi
February 2010
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix instant messaging.