You don't. The electric system is controlled by a relay that is triggered by the drivetrain computer(PCM). Your relay may be shorted out or your pcm might be faulty or is commanding it on all the time for a reason. At any rate the power feed to the pump thru relay control should be the AUX B **** fuse under the hood if you want to disable it until the primary problem is solved. Relay is in the same electrical box. Are you not showing any other problems or warning lights? Can you test your relay?
The electric motor Secondary Air Injection
(AIR) system is used on the 5.7L to reduce Carbon Monoxide
(CO) and Hydrocarbons
(HC) .
The AIR system adds air (oxygen) to the exhaust manifold to continue oxidation after the exhaust gasses have left the combustion chamber. The heat from this reaction brings the
catalytic converter up to operating temperature taster when the engine is cold. This system consists of an electric AIR pump, check valves, and necessary plumbing.
An electric motor
AIR pump supplies filtered air from the air intake system to the AIR injection pipes.
The check valves, on the AIR injection pipes, prevent backflow of exhaust gasses in the
AIR pump.
When the engine is started with a coolant temperature above approximately
15°C (45°F) or if the fuel system is in the Decel Mode, the
VCM energizes the AIR relay. The AIR relay then energizes the AIR clutch, which directs air into the exhaust manifold ports.
The
control module may turn the
AIR pump OFF when any of the following conditions occur:
- The system is in the Closed Loop mode
- Any DTCs are set
- The system is in Power Enrichment mode for more than a short period of time
- Low manifold pressure (over run)
- Quick vacuum rise (rapid decel)