I have recently purchased a 1998 Plymouth Grand Voyager with a 3.3 motor. The a/c wasn't working and added a/c coolant and still not blowing cool air. I just installed a new Expansion Valve and still no cool air. I was told that the a/c is not working due to all the blinking lights on the instrument panel (wipers, defrost, a/c, etc.) Why are the lights blinking steadily? What can I do to fix this problem?
Start off with a calibration test.
Set the parking brake, start and warm engiine to operating temp. Turn the blower switch to high, turn mode switch to panel, open all outlets. Move temp lever to full cold.
Press and hold rear wash and rear wiper buttons simultaneously for 5 seconds until all led light light up. All should light for 5 seconds. Rear wiper and intermittant wiper button leds will flash alterantley during test.
Afte 1 minute roughly, if only the rear wiper button led is flashing, calibration is done. However if rear wiper and intermittant wiper button leds are flashing, then we need to get the DTC (s).
Dtcs are found during the last flahsing sequence of the rear wiper and intermittant leds. There is a code level and a code value, The code level is represented by the flashing of the rear wiper led and the code value by the intermittant rear wiper led.
Each time the rear wash button is pressed, rear wiper button led will cycle to the next code level in numeric sequence.