Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
low and 2 will not work at all ?
with the car on and blower set to 2 speed does the TAN wire are the resistor show 12 volts ?
if the blue and orange show 12 volts and the tan when set to 2 and the black/white when set to lo ( 1 ) does NOT show 12 volts then the problem is the blower switch itself is bad or has a bad connection plugged into the blower switch
all the speeds use the same power so we have power
right at the switch when set to 2 does the tan have 12 volts right at the back of the switch ?
for a 2000 cav they send power to the blower motor and just vary the ground
see here it switches a ground
if you unplug the resistor with an ohm meter to ground and set the blower switch to 2 does the tan wire show a good ground ?
does the tan show a good ground at the resistor with it unplugged when set to 2 ?
the switch sends out a ground to the resistor for which ever speed you are selecting
if on 2 the tan will show a ground at the resistor with the resistor connector unplugged then the resistor is bad
the control side and resistor just uses a ground and NOT power to operate the blower as seen in the diagram i sent
this should come down to a bad resistor
very common for these cars
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