ONOFF Two Speed Control with a Resistor

This type uses a double contact relay and a series limiting resistor.

Two Speed Fuel Pump Control with Resistor at Low Speed

When the engine is idling, or under normal driving conditions ( when a small amount of fuel is required), the ECM turns on the fuel pump control relay. The relay switches to contact B, sending current through the resistor. This reduces the available current and voltage to the fuel pump, causing it to run at low speed.

T852f190

T852f190

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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