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Reading between the lines, I think you mean the LED on Climate Control Panel on the dash is flashing.
If so, this means an air conditioning system fault has been detected and a code has been stored in the module.
Page 1C1-2 of the 1990 Service Manual covers the retrevial of the codes.
To do this, push and hold the fan up and down arrows at the same time for about 5-6 seconds. The LCD will show "-00". Push "Auto" and the LCD will show any fault codes that are stored.
While in the diagnostic mode, it is possible to show a number of other system parameters also, but the one you want is "-00".
Fault Codes
00 Not used
01 Temp. Door Motor Circuit Fault
02 Temp. Door Motor Circuit Fault
03 Ambient Sensor Open
04 Ambient Sensor Short
05 In-Car Temp Sensor Open
06 In-Car Temp Sensor Short
07 Solar Load Sensor Open
08 Solar Load Sensor Short
09 Low Freon Detected
10 UART Failure
Last edited by Wildride; Jan 20, 2007 at 07:23 PM.
Check the owners manual also, I have done this and it works; pull fuses #1 and #17 wait 20-30 seconds then replace and start the car, should
clear. When it did not clear I was low on freon. Hope this helps.