Ammeter System Test

NOTE: This test is only for vehicles equipped with an ammeter.

1. With normal operation, when ignition switch is off and no electrical load, ammeter should show 0 on center scale.
2. With ignition switch on and the engine running (fully charged battery), needle deflects towards charge and returns toward center scale in time.
3. With ignition switch off and headlamps on, ammeter should show discharge. If the ammeter does not register a discharge, check for loose connections at the ammeter, or an open circuit wire, prior to replacing the gauge.