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Secure the ring terminal to a grounded component of the chassis. Next, route a length of wire from the pressure switch to a positive 12 volt, 20 amp, ignition activated power source on the vehicle. Cut a length of 16 gauge wire from the 6' length included with this kit. Crimp a blue female terminal connector onto the black lead from the comprssor. Install the female terminal connector over the remaining spade on the pressure switch. Connect the lead from the pressure switch to the 12 volt wire w