I finally found how by accident by trying various suggestions from later models Thanks anyway Cruban
To set the clock on a 1989 Corvette the radio must be turned off. After turning the radio off hit the set button and then hit scan. The time can be set using the arrow buttons.
To set the clock on a 1993 Plymouth Sundance, first, ensure the ignition is in the "Run" position. Locate the clock setting buttons on the dashboard; typically, there are two buttons labeled "HR" (hour) and "MIN" (minute). Press the "HR" button to set the hour and the "MIN" button to set the minutes until the correct time is displayed. Once set, the clock will retain the time even when the ignition is off.
This information can be found in the owner's manual. This information can be found in the owner's manual.
If the clock/radio is anything like the one on the '93 Plymouth Voyager, here is how you set the clock: First turn on the radio, then press the set button. When it shows the "P" hit the select button, and it should change to just hours. Turn the Tuner knob to forward or back to set the time you want. Hit the Select button again to go to minutes, and do the same thing with the Tuner knob. Hitting the select button a third time will save the clock settings. ..
the cam gear mark is set at 6 o' clock and the crank gear mark is set at 12 o'clock.
To set the clock on a 1989 Cadillac Brougham, first turn the ignition to the "On" position. Locate the clock setting button, usually found on the dashboard or near the radio. Press and hold the "H" button to set the hour, and use the "M" button to adjust the minutes. Release the buttons once the desired time is displayed.
wuth key on acc. press CLOCK,SET,CLOCK. time and date will flash, then press SET until the desired setting appears then press clock again. repeat this until you are done.
As I recall, it was a matter of turning off the radio, pressing SET, and then holding SEEK or SCAN to set the hours or minutes. When finished, press SET again.
With the radio turned off, push the set button. The scan button changes the hours and the seek button changes the minutes.
the clock is set for time
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