What are the three relays under the hood? I know the one on the drivers fender is the horn relay, but what is the one on the passenger fender and the other on the firewall being the brake booster? I have attached a picture of a car I found with the same three I have.

 

The one on the passenger fender is for A/C. I think the other one is also but I will have to look.

 

Blower motor.

Pat

 

High speed relay (blower)
I second the motion