Amperage Output Test

NOTE: Ammeter with inductive pick-up clamp-type test lead is recommended. Perform test soon after starting engine, as charging amperage will drop quickly.

Disconnect negative battery cable. Disconnect alternator output wire from alternator terminal "B". See Fig 1 . Connect ammeter in series between terminal "B" and disconnected output wire. Connect voltmeter between terminal "B" and ground. Reconnect negative battery cable.
Voltmeter should read battery voltage. If voltmeter reads zero volts, check for an open in wire between alternator terminal "B" and positive battery terminal, a blown fusible link or a poor ground connection.
Turn on all electrical accessories. Start engine and accelerate to 2500 RPM. Read maximum amps output. If alternator amps output is within specification, alternator is functioning properly. See ALTERNATOR SPECIFICATIONS table.

ALTERNATOR SPECIFICATIONS ⁽¹⁾

Application

Rated Output

Minimum Output

DOHC

90 Amps

63 Amps

SOHC

110 Amps

77 Amps

⁽¹⁾	At 2500 RPM.

Fig 1: Amperage Output Test (Avenger & Sebring)

Courtesy of CHRYSLER CORP.