No signal to blower motor controller
Thread Starter
Cruising
Joined: May 2019
Posts: 10
Likes: 0
blower motor not working at all tests completed so far
Ok edited this whole thing because i goofed on the rest. So Im not getting voltage to the blower motor and im not 100% sure what im looking at. Im getting anywhere from 0 volts to .035 volts raising the blower motor from low to max on my display. Getting 12v and ground to the black wire and red wire, then the variable voltage from the tan wire. I guess my thing is, is this pointing to the blower motor controller being bad? Or am i not getting enough voltage from the head unit?
Last edited by Empire087; Apr 5, 2020 at 05:21 PM.
Pro
Joined: Nov 2018
Posts: 674
Likes: 102
There is a relay in the passenger foot well above the BCM that could be bad or have a bad connection.
I wouldn't think the control is bad if you can get a varied voltage on the tan wire.
There is a blower module on the back side of the blower motor that could be out and I believe there are two fuses that power the hvac unit in the fuse box also
I wouldn't think the control is bad if you can get a varied voltage on the tan wire.
There is a blower module on the back side of the blower motor that could be out and I believe there are two fuses that power the hvac unit in the fuse box also
Melting Slicks
Joined: Jul 2004
Posts: 3,294
Likes: 482
From: Brea CA
Which HVAC system do you have, Dual Zone or manual?
If you apply power directly to the blower motor (after disconnecting it from its controller) does it work? If so then the controller is bad.
For the dual zone system it is a digital motor speed controller. For the manual system it is a resistor.
Gary
If you apply power directly to the blower motor (after disconnecting it from its controller) does it work? If so then the controller is bad.
For the dual zone system it is a digital motor speed controller. For the manual system it is a resistor.
Gary
Thread Starter
Cruising
Joined: May 2019
Posts: 10
Likes: 0
Which HVAC system do you have, Dual Zone or manual?
If you apply power directly to the blower motor (after disconnecting it from its controller) does it work? If so then the controller is bad.
For the dual zone system it is a digital motor speed controller. For the manual system it is a resistor.
Gary
If you apply power directly to the blower motor (after disconnecting it from its controller) does it work? If so then the controller is bad.
For the dual zone system it is a digital motor speed controller. For the manual system it is a resistor.
Gary
Last edited by Empire087; Apr 7, 2020 at 06:34 PM.
