Clock Does Not Activate

Perform POWER SUPPLY CIRCUIT CHECK under PRELIMINARY CHECK. Check TCU output for clock circuit. For analog clock equipped equipped models, connect voltmeter between terminals 5 and 4 of TCU harness connector. When ignition switch is turned OFF, voltage should swing from 0V to 12V. For digital clock equipped models, connect voltmeter between terminals 2 and 4 of TCU harness connector. When ignition switch is turned OFF, voltage should be 6V. If voltage is not as specified, replace TCU. If voltage is as specified, check clock, and harness between TCU and clock.