Here's the schematic:
From the Service Manual:
"The circuit is activated only in the crank mode. The power is supplied directly from the starter solenoid and only hot in the crank mode. The system is controlled by a cold start fuel injection switch which provides a ground path for the valve during cranking whenever the engine coolant temperature is below 35 deg C (95 deg F). The cold start injection switch consists of a bimetal material which opens the circuit at a specified coolant temperature. This bimetal material is also heated by the windings in the switch which would allow the cold start valve to stay on 8 seconds at -20 deg C (-4 deg F) or below. Above that temperature, the maximum time the switch will stay closed is proportional to the coolant temperature. In other words, as the coolant temperature goes up, the maximum cold start valve ON time goes down."
