Hello,
I've got a 1999 s80 with some battery problems. As I was driving home, I put the turn signal on and immediately the radio turned off and it came back on when I turned the signal off. I turned the car off and it did not turn back on, no engine turn-over just the clicking noise. I jumped it with another car, disconnected the cables after a minute or two and let the car run. The lights slowly dimmed and pulsated as they became more dim. We're not sure if it's the alternator, the battery (which doesn't have a full charge) or something short circuiting. I'm going to do a full overnight charge then take it to Advance Auto but I'm wondering if anyone here has an idea.

Thanks for the help!

 

sounds like a bad battery but check to see if your alternator is pushing 14V. You may very well have a bad alternator that is not charging your battery if the load test on battery is okay.