I replaced a head unit in my 2007 f150 super crew and the harness to the fan control knob disconnected in the process. Once I put everything back together, the a/c runs low on 1-3 setting and high on 4. Did I do something wrong in the reconnection? Is there a process to that instead of just plugging it back in? Sent from my iPhone using Tapatalk
The fan motor plug has several wires going into it. Make sure none of the pins were crossed plugging it back in. If everything checks out with the blower motor fan wire control plug in then that sounds like the blower motor fan resistor went bad but not likely since it worked before head unit install. Try disconnecting the battery 10 minutes anyway incase it was some wierd power glitch. If that doesn't cure it, and all pins of the blower motor control are inserted properly into their prospective slots, go for the blower motor fan resistor fix.
Incredible info! Thanks so much for the response! I’ll follow up with results Sent from my iPhone using Tapatalk
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It was a stupid mistake. Top part of the connector was not fully snapped in. Works as usual now. Thanks for your help Sent from my iPhone using Tapatalk