My gf`s Olds 88 has been having some random starting problems lately. When you turn the key,the dash lights totally dim out,and the started doesn`t even make a hint of a noise. Let it sit for 1 minute and it starts up just fine. Stopped by Autozone to have them check the battery,and they hooked up thi sdiagnostic machine. Showed the battery is perfect,and all the other aspects of the electical checked out perfect too. Side note,I opened the hood this time when it didn`t want to start,and smelled a burning smell. What could it be?