This is from my 96 manual, it should be the same....
Somehow your heating and air conditioning system got into
calibration/diagnostic or test mode, and seem to be indicating a failed
system. Normally this is accomplished by pressing a particular combination
of these buttons and holding for 5 seconds. The tests can run for many
minutes (up to 15) as it checks/calibrates all the motor/actuators and tests
the cooldown ability of the AC.
Results and failures are shows as various combinations of flashing LED's on
these same button lights.
For test abort you can turn ignition off, then on, or the test should abort
after 15 minutes if still not passed. It will however be flashing the
failure code that caused it not to pass within the 15 minutes.
Test mode and failure modes are differentiated by either the LED's flashing
alternately or simultaneously.
Try to run the test purposely to see if it will pass and reset.
Set Blower to HI
Set the Mode to Panel (all the way to the left - CCW)
Set the temperature to full Cold (both slides if dual zone equipped)
Depress and hold the Wash and Wipe buttons simultaneously and hold for 5
seconds (until all LED's light up)
First Wipe and Intermittent LED's should alternately flash during Cal Test
Then after a few minutes AC and Recirc LED's should flash alternately during
cooldown test
If both tests pass - all LED's will go out and that's the end of it.
If it does not pass, then you really either need the manual to use the
buttons and flashing LED codes to dig deeper into the failure codes for
specific components or take it into a shop for them to diagnose and repair.
Failures flashing LED's can indicate several potentiometers, temp sensors,
actuators, control panel etc.
