When you are installing a new wiring harness, it is very important to think about protecting the wires and other elements from overheating. A PCM controlled weatherproof fan relay kit from Painless Performance®™ offers just the solution you need. This particular kit provides direct battery power, protects PCM from voltage spikes and prevents the fan from feeding back through the vehicle's wires. As with all the Painless Performance®™ products, installation is super easy. For more information about this product, check out the online instruction manual.