Blower motor not blowing on high speed???

[craignunez]

no use starting a thread if you are not going to take to time to read the suggestions posted

The wires are not burnt.

 

[fleming442]

Replaced the relay still not working. It only blows on the 2 medium speeds not low or high?

Good for you! Does it have power?

 

[craignunez]

When I checked yesterday it did have power

 

[pontiacgp]

does it have power at the relay?

 

[fleming442]

When I checked yesterday it did have power

What about ground?

 

[craignunez]

Yes

 

[craignunez]

Yes

How do I check ground??

 

[Longroof79]

How about checking the connector located over the right side valve cover? If any of those connections are dirty or tarnished, you won't have the high speed function on the blower motor.
Very common problem. I've encountered this a number of times.

 

[fleming442]

Jump a wire from the fender to the blower ground while it's on high. If it starts, you need to find out why the factory one doesn't work.