Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
I am sorry that you have not been helped yet. I just came online and saw your question.
First, I need the vin number to pull both the wiring schematics and wiring routing to check for common areas of concern and if it is possible that you pinched or crimped wiring somewhere.
Also check the connector at the blower motor with the switch on high and see what the voltage reading is and let me know
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It sounds like you have a ground off.
The code reader maybe back feeding a ground to make wiper and fan to work.
There are 2 grounds you need to check. Make sure they are clean and tight.
At the lower center of the I/P, attached to the upper front side of the I/P fuse block.
At the RF corner of the passenger compartment, behind the RF kick panel.
Please let me know if this helps
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As for the high speed fan. Make sure that the purple wire at the blower resistor. Has power when the fan switch is on high.
If you do you need a resistor.
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