Need help with diagnosis...
#1
#2
RE: Need help with diagnosis...
It most likely needs a blower resistor. See if you have power going to the blower motor wire in any switch position other than high, a test light will work fine, if no light on the lower settings then check the input for the resistor the same way. If you have power going in to the resistor but not coming out then the resistor is bad. If no power is getting to the resistor then your switch is probally bad. I'll try to post some pictures later.
Will
Will
#3
RE: Need help with diagnosis...
Use this to check your blower resistor and switch.
[*]Disconnect and isolate the battery negative cable.[*]Reach under the passenger side bottom of the HVAC unit and unplug the wire harness connector from the blower motor resistor.[*]Check for continuity between each of the blower motor switch input terminals of the resistor and the resistor output terminal. In each case there should be continuity. If OK, repair the wire harness circuits between the blower motor switch and the blower motor resistor or blower motor relay as required. If not OK, replace the faulty blower motor resistor.
[ol][/ol]
[*]Disconnect and isolate the battery negative cable.[*]Reach under the passenger side bottom of the HVAC unit and unplug the wire harness connector from the blower motor resistor.[*]Check for continuity between each of the blower motor switch input terminals of the resistor and the resistor output terminal. In each case there should be continuity. If OK, repair the wire harness circuits between the blower motor switch and the blower motor resistor or blower motor relay as required. If not OK, replace the faulty blower motor resistor.
[ol][/ol]
#5