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Does the computer control voltage to fuel pump on 1997 S10?

Yes, the computer (PCM - Powertrain Control Module) in a 1997 S10 controls the voltage to the fuel pump, but indirectly. It doesn't directly control the voltage, but rather provides a ground signal to the fuel pump relay. The relay then completes the circuit, allowing power from the battery to flow to the fuel pump. The PCM controls when the ground signal is provided to activate the relay, and therefore the fuel pump.
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