gmachinzz said:Keep in mind the Dodge wiring for the fans is in series-unlike any junk aftermarket fan hut far more reliable. You will need to chassis ground both black leads, then there is usually a green and a yellow lead-powering either one alone gives you low speed, powering the 2nd one gives you high speed. Keep this in mind when building a relay kit for them. On my relay kits I use a 40A weatherproof fuse holder because I have seen on occasion 25-28 amp draws on high speed. I would run the relay power from a remote 12V junction instead of the battery because its easier for the alternator to see a drop in voltage in the system instead of the battery.
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