Input Test

With the connector still disconnected, make the input tests at the connector according to the table.

TERMINAL TEST CHARTS

Terminal	Test
5	Measure the voltage to ground with all conditions: There should be battery voltage.
6	Measure the voltage to ground with audio power switch ON: There should be battery voltage.

Reconnect the connector to the subwoofer/ amplifier unit, and make the input test at the connector according to the table.

TERMINAL TEST CHART

Terminal	Test
4	Measure the voltage to ground with all conditions: There should be less than 0.1 V.

If the input test proves OK and the subwoofer has no sound, replace the faulty subwoofer/amplifier unit.