Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.
Has anything else been checked or tested for this fault here at all?
Let me know so we can continue,thanks Pete.
One more thing,can you tell me what liter engine is in this model here?
Is there power on the brown wire at the resistor assembly for the rear blower with the key on or engine running?
Is there a 4 pin connector plugging into the rear blower motor resistor assembly?If so in terminal D there should be a brown wire.Let me know,thanks Pete.
This is the diagram for this year and model,manual ac controls less sunroof.It shows two connectors at the auxiliary blower motor resistor/relay assembly.
If you follow the blower motor wiring at the rear blower does it lead to this resistor assembly with two connections plugged into it?
Let me know if your able to locate the wiring posted here.
Unfortunately this is all of the info I have on this here myself.
I will open your question up for others here to see if someone else can assist further on this as there may be others here that may have more info on what to check or do with this issue.I hope you can get this resolved with ease.No need to reply to my last post here unless it is a last resort as it will keep your question locked to me and others will not be able to view it.If you feel you want to continue to work with me on this feel free to reply at any time but keep in mind in some cases it can be difficult to fully diagnose or help repair this without seeing your vehicle.
Hello and welcome! My name is ***** ***** I can assist you with your question. Please post your VIN on this page for me so I can get you the correct diagram. Thank you!
Thank you for the VIN! The orange wire is the power wire going into the rear blower assembly unit. The black wire is ground.
So you did find the purple wire? No voltage on this wire at all correct?
Thats right. It should have voltage on it. the voltage on the Purple wire pin B as the blower speed is changed; the voltage should change from 4.0 volts to 0.4 volts.
There is a front auxiliary control unit located in the front of the console and the rear auxiliary control unit located in the rear of the overhead console. The front auxiliary unit needs to be switched to the rear position for the rear unit to control.
The purple wire may be open or broken going to the rear. Check the Purple wire from the blower motor to the Heating, Ventilation and Air Conditioning control rear assembly located in the front overhead consol. If the Purple wire is good from the blower motor to rear control unit, check connections at the rear control unit. If the connections are good check for B+ at pin B1 Brown wire and for a good ground at pin A8 Black wire. For the temperature control check for B+ at the rear air temperature actuator pin 5 Brown wire and for a good ground pin 7 Black wire. Check for 5 volts on the Gray wire pin 10 and a varying voltage at pin 9 from 5 volts to 0.4 volts depending on the position commanded. Check for 2.5 volts on the White/Black wire, the voltage should change from 2.5 volts to 0 volts or 5 volts depending on the command and then go back to 2.5 volts (if commanded to override position the voltage will remain at either 0 or 5 volts).
I think this is the correct diagram for your circuit. Please check the wiring and connectors to ensure they match up with this diagram.
Since yours is manual, there may not be any varing voltage on that purple wire. That might just be for the auto HVAC system..
No, sorry.. thats wrong. Thats for the front. Scratch that. Is there a brown wire going to the rear blower resistor assembly?
If so, check that wire for power. The orange wire and brown wire should have battery voltage on it
According to the wiring diagrams I have, the brown wire goes to the rear blower resistor. One of the issues we are running into is that there are so many options for this vehicle and so many different diagrams. Can you list all the color wires going into the rear blower resistor?
Can you send me a picture of the connectors going into the rear resistor/relay assembly?
Is the rear resistor and relay seperate?
Is there a red wire going into the relay? Does that have power?
Every one of my diagrams have a purple and black wire going into the rear blower motor. NO red wire going to the rear blower.
Just like that pic you sent me
YES, I do. Unfortunately I dont I am able to help you. I am going to leave this open for other experts. Good luck!
I'm only finding these wires in an auto system, the purple being a logic circuit from the rear module, i'd ohm this circuit to the module for an open. it will be pin A9 on the connector shown, i cant pull a picture for module location but it has 2 connectors, the description says in the overhead console, but depending on build it should be #3 in that first image you sent or if not equiped it will be the controls themself