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You should get the relay and the basic wiring for the unit as well (at least from the fan unit to the relay). I installed the fan in front of the condensor, and bolted it up using the 240 brackets and some that I made. I routed the harness through the hole in the driver's side of the core support where the headlight harness passes through (plenty of room there). I pulled power from the main positive junction box, to the relay (the big wire), and from the relay to the positive side of the fan wiring. The negative side of the fan wiring has a ring terminal that serves as a ground, and it went to the same screw that the drivers turn signal/park lamp ground uses. The small black wire from the relay goes to ground as well. Now you need a trigger source. I used the green wire from the low pressure cycle switch (this harness goes across the front of the car down on top of the lower core support. I tapped into this wire and connected the small feed wire from the relay to this. Whan the A/C is off, the fan does not run, but when the compressor kicks in, the fan srarts too. You could wire it through a switch (installed in the center console) and powered from the fuse panel so that you could manually controll the fan, or install a thermo switch so that the fan would come on at a preset temperature. I needed more air across the condensor (mine was converted to R-134A several years ago) for help with making the A/C cooler when in town and the air flow across the condensor was low. It now puts out cold air at a stop light just like it does when on the highway.
Bill
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