AC, rear window everything control

Hi everyone.
Could someone explaines to me again how to re-program the AC, rear window
defrost, rear window wash and rear whiper on a 98 Voyager?
I have those two lights blinking all the time and nothing work properly and
i see
winter comming. I have tried pressing AC and rear window washer for 5
seconds as I been told
to do before on this forum and all the lights on the buttons start flashing
but after few minutes the same two lights start blinking as before.
Should I do better in changing the whole control with an other used one?
Thank you.
L.G.R.

 

those lites blink in a certain sequence when the module detects a fault code
and proper operation ceases when a fault is recorded untill the proper repair
is done.
this is on board diagonistics
if t this is occuring to you, a factory service manual spells out the flashing
sequences and decifer fualt codes accordingly
the engine should be running at op.temp before system is retrained
the temp levers should be in the coldest settings and blower should be at full

press the botton left button at the same time as u pres the top left button and
hold both down untill they start flashing then let up and let the system do
what it does and go from there if the same 2 buttons u pressed are flashing at
the end all is good shut off van and restart it and see what happens