A/C Fan?

[ApullinV6]

My Fan doesn't work on high. Works on 3 of the 4 speed settings. I've heard that the switch is the cause in most cases. I changed the switch, still no high.

Is there any kind of relay that might be the prob.?

Need help, has anyone ran into this before, Thanks.

 

[FlyinGN]

Heres some help. Mine only worked on HIGH and no other speeds and I replaced the relay next to the blower motor on the heater box under the hood and now its fine.. Try that..