ac/heater fan

[hotshotzny]

i have a 2000 mustang 3.8 v6, the ac and heat work great but the fan only has 2 speeds, low and full blast, im assuming it is a resitor or a relay perhaps but im not sure where it is located, any help? part number etc..
thanks

 

[wmburns]

Is this is likely the ballast resister. Located on the passenger side under the glove box.

 

[hotshotzny]

thanks, for whatever reason ive yet to get a shop manula for it, guess i need to do that and be prepared.. thanks, thats where it is inmy h3 so i assumed it would be the same but figured id ask