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03/12/2024 3:49 pm
Topic starter
Hey, 2010 Volvo xc60
blower motor won’t turn, testing the voltage of 4 signal
Blower resistor connector voltage
wire + power pin connector with multimeter, is it normal when I go from low, starts at almost 12v, then when I got higher fan speed the voltage drops to 2v?
2 Answers
1
@imperator im looking on all data and it’s hot at all times, so i guess its normal, i see a nice square wave with my 1 channel oscilloscope moving around when i turn on and off.
can you post the diagram and your scope traces
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04/12/2024 7:25 pm
motor should have 12V on pin 2 (yellow+red) at all times (relative to battery negative, not to the black wire!) . Pin 1 (Black wire) pulses 0V according to speed setting, probably ranging from 5% to 95% duty cycle. If voltages are correct then motor is blown.
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