WHAT MATTERS IS NOW ,NOT THEN.
2nd speed blower is dead.
so is , not the blower, if high works
it is
1: bad resistor block
2: bad control
3: bad wired from there to there. 1,2.
it's not a fuse
the car CAM NEW WITH 2 OPTIONS, AUTO OR MANUAL HVAC.
THE
CONTROLS ARE NOT THE SAME.
AUTO HAS NO RESISTOR BLOCK AT ALL , IT USES TRANSISTOR MODULATION. IN THE CONTROL HEAD.
SO YOURS IS MANUAL
AND CAUSE IS ABOVE, 1,2,3
LEARN TO USE A VOLTMETER.
THE BLOWER DC MOTOR IS GROUNDED, AT TERN :"A"
THis pin X
must be 12vdc, speed 2 selected.
if is 12vdc the resistor block is bad (or its wires)
manual.controls. as you can see the resistor is tricky series type
so of 2nd Resistor burns open speed 2 and 3 fail but never 4.
if 3r RES burns open speed 3 lost but not 2 and not 4.
and not 1.
speed 4 is relay controlled, and pin C lower. right.
use a voltmeter and win the prize, SOLVED