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Re: Fuel Injection Relays
Posted to Technical Discussion Forum on 2/5/2018 2 Replies

I believe the voltage you see on the fuel pump relay is a trace voltage the ecm uses to verify the relay is on. The eccs relay is controlled by the ECM. It appears to have power at all times and be grounded in the ECM. If all the power and grounds are correct ... Login to read more.

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