high speed on fan is gone...

[ZRGator]

The high speed on my fan is shot. Particularly bothersome when trying to crank up the a/c. I can't seem to find an original replacement relay for this..any help? Thanks, guys. Also, where might this problem be located?

 

[JohnZ]

Is the ground wire for the relay intact? The relay is attached to the fiberglass evaporator case, and has a separate black ground wire that goes under one of the two attaching screws.

 

[ZRGator]

Is the ground wire for the relay intact? The relay is attached to the fiberglass evaporator case, and has a separate black ground wire that goes under one of the two attaching screws.

Thanks for the hint, John, I'll go check it when I get home tomorrow night.

 

[magicv8]

Factory A-C cars have a separate fuse for A-C under the hood, but the heater blower fuse is under the dash. Check both.

 

[JohnZ]

As posted above, the high speed A/C blower relay is fed directly from the horn relay screw terminal by a red wire with an in-line plastic fuseholder with a 30-amp fuse in it; check that wire for power at the relay connector - it should show 12 volts all the time, key on or off.