Installation manual
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Installation Manual                Section 6 
PUREFLOW® DIESEL SYSTEM
AirDog™ 
WIRING HARNESS 
The AirDog™ is equipped with a relay controlled wiring harness that connects directly to the 
battery  and is activated  by  the OE  fuel pump connection.  Optional  "low  fuel  pressure" 
warning light is available.  
6 - 1  Connect the RED lead to the POSITIVE (+) post of the driver's side battery. 
  Connect the GREEN lead to the NEGATIVE (-) post of the same battery. 
6 - 2  Route the wiring harness to the AirDog™ and connect the 3 pin Deutsch  connector 
to the corresponding connector on the AirDog™. 
6 - 3  Secure the relay to the vehicle at either the engine side wheel house or firewall near 
the steering column. 
6 - 4  Disconnect the OE fuel pump lead from the ECM  connection  (Deutsch,  two pin 
connector). 
6 - 5  Connect the AirDog™ 'Relay activation lead' to the OE fuel pump ECM connection. 
6 - 6  Optional light kit.  Remove 1/8” npt plug located in top of base, below the motor. 
Screw in pressure switch and tighten.  Fasten the two wires from the wire harness to 
the pressure switch. 
     NOTE:  If the optional indicator light is not used, place electrical tape around the 2 
indicator light terminals on the wire harness, keeping both spade terminals separate.   
6 - 7  Drill a 5/8" hole in firewall  approximately  2 inches to  the door side  of the steering 
column to allow entry of the Indicator Light harness into the passenger compartment. 
6 - 8  Route the Indicator Light harness through the firewall. Install the grommet supplied in 
kit around wiring harness where it passes through the firewall to prevent chaffing. 
6 - 9  Install Indicator Light and Dash Plate in lower left dash area or where desired. Drill an 
11/16" hole at the desired location to mount the indicator light assembly. Install the 
adhesive backed dash plate by removing the backing and matching the corresponding 
dash plate hole with the 11/16" hole. 
6 - 10  Properly assemble  the  indicator  light  in  the  dash  plate.  Connect  the  two  female 
connectors on the wiring harness to the spade connectors on the indicator light. 
BE SURE TO PROPERLY ROUTE AND SECURE THE WIRING HARNESS TO 
THE VEHICLE. 










