They will have a temperature sending unit in the intake manifold. 180 degrees. I assume they ground out when the temp hits 180, turning on the fans. They have a power wire that will go to a Mad Electric junction, and from there to either the alternator or battery.
What I am unsure about is what is the best keyed 12v connection? This way, they only go on when the key switch is in run and the temp is over 180.
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1965 Pontiac GTO
455/469 w/ #48 Heads, '65 Tri-Power
9.25:1 CR
Stump Puller Cam
Muncie M22W 1st-2.56 2nd-1.75 3rd-1.37 4th-1.00
3.55 Rear Differential
Front: 225/60R15 Height: 25.6"
Rear: 275/60R15 Height: 28"
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