Alternator Relay
- Testing information for relay internals is not available from manufacturer. If there is an interruption in charging system warning light circuit, alternator relay functions as a back-up for electrical flow from ignition switch.
- To test warning light circuit operation, perform following test. Connect voltmeter to battery. Start engine and note voltmeter reading. Charging system voltage should be 13-15 volts. If charging system voltage is not as indicated, go to step 4). Locate and remove alternator relay from power distribution center. See Fig 1
.
Courtesy of CHRYSLER MOTORS.
- With relay removed, if voltmeter still indicates charging voltage between 13-15 volts, warning light circuit is good. If voltmeter indicates battery voltage, repair warning light circuit as required. See Figure
.
- If charging voltage is not as indicated, check alternator 2-terminal connector Black/White wire for battery voltage when ignition switch is in RUN position. If battery voltage does not exist at Black/White wire terminal with relay installed in power distribution center connector, check for open in circuit from ignition switch to alternator. See Figure
.