I'm an aircraft electrician so I love troubleshooting. My 2007 Pacifica lost rear a/c blower. I confirmed the lower fan motor operates smoothly. There is no voltage getting to the connector at the motor.I noticed that the power wire leaves the control unit a smaller gauge and arrives at the motor connector a larger gauge. Is there a splice or does it go through another component? Control unit is p/n 05005469AB. Thank you, Terry