I have been running the Derale 16789 a Dual fan High-Amperage Adjustable Fan Controller
HOW IT WORKS
The Derale High Amperage Adjustable Dual Fan Controller is designed to
operate two electric fans at different activating temperatures. Fan #1 is
designed to activate at the desired adjusted temperature (150 -240°F).
Fan #2 will activate once the vehicle water temperature increases by 10°F.
The fans will deactivate 10°F below each turn-on temperature.
This unit is designed to control 2 electric fans with a
Maximum Draw of 35 Continuous Amps Per Fan.
Last edited by 65 Imp SS; 04-13-2012 at 08:24 AM.