Alternator and Regulator Circuit Test

Alternator/Regulator Test:

NOTE: Be sure the battery is sufficiently charged.

CAUTION: The voltage will rise quickly when the alternator is full-fielded. Do not allow the voltage to exceed 18 V; it may damage the electrical system.

NOTE: Attach a probe to the VAT-40 full-field test lead, and insert the probe into the full-field access hole at the back of the alternator. Switch the field selector to "A (Ground)" position momentarily, and check the amperage reading.