I’ve got a 92 LS that has been having a click-no start issue for months. I thought it was the starter because when I had someone turn the key while I banged on the starter with a pole it would start just fine. So before I went to buy a starter, I decided to go to Advanced to see if they could check my alternator first. The guy did the test and said I was getting “excessive ripple.” I have no clue what that means because I’m a bit of noob so I’ve provided pictures of the test results his machine printed out for me. Now I have no idea if my starter or alternator is causing the click-no start. If anyone could help I would definately appreciate it.
It is your alternator you need a new one cause you diode bridge rectifier you lost a diode or one of the diodes is leaking which means your alternator is putting out 90 amps but then pulling back 30 amps