What Would Cause A Good Alternator Not To Charge. If you have a voltamp gauge it will read the alternator output for you. This is the third conversion Im detailing and it is for those who have an externally regulated alternator now and want to take their charging system one step forward in life.
If you have a voltamp gauge it will read the alternator output for you. Its worth noting that a bad serpentine belt can cause the alternator. If the charging circuit connections are good continue with the following tests.
Run engine at 2000 rpms for tests and turn on the blower fan for the AC or Heater the headlamps and any other accessories that put a strain on the alternator and watch the gauge to see if it decreases voltage or amperage.
The alternators job in your Silverado is to provide electricity as it is running. If the charging circuit connections are good continue with the following tests. Check the alternator gauge. Many times an alternator is attached to a freshly painted engine and if the paint inhibits grounding the alternator will not charge.
