Circuit/System Testing

Without Amplifier

1. Ignition OFF, disconnect the harness connector at the appropriate speaker.
2. Radio ON, test for 5.0-7.5 volts between the signal circuit terminal A and ground.
   • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
   • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
3. Test for 5.0-7.5 volts between the signal circuit terminal B and ground.
   • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
   • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
4. If all circuits test normal, test or replace the speaker.

With Amplifier

1. Ignition OFF, disconnect the X2 and X3 harness connectors at the amplifier.
2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
   • Left front door or tweeter - Connector X2, terminal 3
   • Right front door or tweeter - Connector X2, terminal 1
   • Left rear speaker - Connector X2, terminal 7
   • Left rear subwoofer - Connector X3, terminal 3
   • Right rear speaker - Connector X2, terminal 5
   • Right rear subwoofer - Connector X3, terminal 2
   • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
   • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
3. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
   • Left front door or tweeter - Connector X2, terminal 4
   • Right front door or tweeter - Connector X2, terminal 2
   • Left rear speaker - Connector X2, terminal 8
   • Left rear subwoofer - Connector X3, terminal 7
   • Right rear speaker - Connector X2, terminal 6
   • Right rear subwoofer - Connector X3, terminal 6
   • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
   • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
4. If all circuits test normal, replace the amplifier.