why does my blower motor only work on 1 2 3 and not 4?

Question

I have a s10 zr2, the blower motor switch works on 1 2 and 3, if i put it on high the blower turns off. what is the problem. Someone told me it the resistor board on teh blower itself under the hood. I took it out and the resistors look fine. Help Please.

Answer 1

I have seen blown blower resistors three times in two different Chevy Cavaliers. 2/3 times the resistor itself looked fine, but was bad.

If you have a multimeter, you can measure the resistance...much better than visual inspection.

Answer 2

That would probably be the blower motor switch. Each speed setting has its own resistor to determine the differant speeds. One resistor could be bad and look fine while the others work perfectly. The switch is most likely located on the blower motor box itself.

Answer 3

Resistor is bad, blower motor going bad, or bad switch.
Trust me I've been a tech for three hundred years! lol

Answer 4

The blower works with a resistor grid at the back of the sprint that passes a definite volume of cutting-edge watching the placing. i think of one or 2 of the resistors have popped their clogs.

Answer 5

Some gm products use an auxiliary fuse, mounted in a special fuse holder on the firewall right above the engine.... maybe your problem, not sure. Good luck!

Answer 6

there,s a fan relay that mounts behind the glove box,you can gain access to it fairly easy,they burn out on chevy,s very often,,mine just went out over winter,,and all i had was 3/4 its about 20 bucks at advance to fix,,good luck.

Answer 7

bad switch replace it

Answer 8

switch

Answer 9

IT'S PROBABLY THE SWITCH IT'S SELF;

Answer 10

relay