Is there a way to check the ECM computer for proper voltage

1991 CHEVROLET S-10
234,789 MILES • 2.8L • V6 • 2WD • MANUAL
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SCKMYJUNK
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I bought a 1991 Chevy S10 pickup 2.8 liter V6 2 wheel drive she started blowing the fuse to the ECM I replace the fuel pump fuel relays the injector plugs I also found a chafed wire by the oil pressure switch I fix that now I'm only getting 8 volts to the fuel pump
Aug 24, 2016 at 5:19 PM
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WRENCHTECH
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  • ASE Certified Mechanic
The power supply for the fuel pump doesn't come from the ECM. It only supplies ground trigger for the relay. https://www.2carpros.com/images/external/41927760.gif
Aug 24, 2016 at 6:37 PM
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