2001 chevy express 3500 no start no link to odb2
June 5th, 2019, 6:57 PM
#1
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2001 chevy express 3500 no start no link to odb2
One morning, van just cranked, i heard no power to fuel pump so i replced it, no change. Cant link with odb2 scan, no power to fuel pump, the pump will 'thud' every so often when key is turned,, getting power to odb port. ,ground on pins 4 and 5, only. .1 volts on pin 2, any ideas?? Thank you
June 5th, 2019, 9:36 PM
#2
Check the easy stuff ... fuses.
June 5th, 2019, 10:25 PM
#4
Next I would use a multimeter or test light, and see where along the fuel pump circuit the voltage stops. You can find diagrams here:
BBB Industries- Premium Alternators, Starters, Power Steering Products and Turbochargers | TSB and Wiring Diagrams Database
BBB Industries- Premium Alternators, Starters, Power Steering Products and Turbochargers | TSB and Wiring Diagrams Database
June 8th, 2019, 4:44 PM
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I did find a blown fuse, dome light but it made no change, i found that if igo back and forth with the key i eventually get the hum from the fuel pump and the fuel gage activates, when i get that iturn the key to start and it starts right up and runs fine. Whats going on here?, ignition switch?
June 8th, 2019, 5:30 PM
#7
Who knows. More troubleshooting required.
At least hook up a light to the pump and see if it comes on every time.
At least hook up a light to the pump and see if it comes on every time.
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June 8th, 2019, 6:13 PM
#9
You already said the pump isn't coming on. I'm suggesting putting a light there. If the light comes on and the pump does not, then you've isolated the problem. It's called troubleshooting.