Sure switch.
ok great job BTW. hot wiring motor. you did 2 tests, need 3.
motor works, but one side is not grounded.
so that means bad controls
there are 2 HVAC systems. one is called manual
other is Climate controls or some name......???
so i cant see what you have.
what you have is this.
the TIPM sends 12v to the blower.
on high the resistor block is byassed, so forget that.
the blower is grounded via
heater AC controller model.
at pin c2 - pin1 db/yl
same controller pin C1-pin9 gets a ground from the cluster brain.
at C4 pin 4 of brain CCN.
if that pin is 0v
and the C2-pin12 is 12v then the switch in the controller is bad.
Switch
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