Saturn Repair Problems? Ask a Mechanic for Answers ASAP
Hello I will help,
You replaced the module on the dash that has the blower switch mounted on it?
Let me know how I can help
That is where the problem should be. Has anyone put a scantool on this to watch the AC request in the body module as you change the blower speeds?
If you have a good voltmeter I can help you check that signal so you can watch it but a scantool that displays the body and engine computer data makes it much easier to check.
The way you check is to monitor the voltage on the request wire and see if it stays steady as you change form 1 to the higher speeds. If it does then the problem is not in the control but if it does change then you still have a problem in the control.
Was the control you installed new or used?
What does not stay and fades?
I don't understand what you are testing? The request line to the BCM?
I can't see or know what you have done unless you describe it to me.
OK, then you still have a problem in the panel.
Try car-part.com and find it local so if you have to return it you can deal face to face.
Great, please let me know if you have further questions
The voltage on the request pin still falls off when you increase the blower speed?
can you just turn the blower speed down and have the clutch come back on or do you have to restart the vehicle?
Can you monitor the voltage feed to the panel when the blower is on high?
Does the voltage to the panel itself fall off as well?
Have you replaced the blower resistor?
OK, then I don't have a reason other than anecdotal evidence that the resistor pack would have any effect on the AC request other than the control is monitoring that the blower motor is running before it will request the compressor on.
I have seen several reports that replacing the resistor will solve the problem. I have nothing to back up why it would.