On the passenger side of my 76 is the relay Bracket. It has the fuzable links on the out side, The voltage regulator in the back, The AC relay on the back side, and one other relay that sits on the front side of the bracket. I have looked in the FSM but can't find out what it is for. Does anyone have an idea what this relay is??

Does this look familiar???

That scan say's '76 models onwards' so it might only be applicabe to Australian or other non US market models as that certainly isn't the setup in my 78.

It does look familiar but I don't have the Auto tranny so it would have to be the Water temp relay # 4. I am going to look at the wires get the colors and try and see if its on the wiring diagram in the FSM.