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Dave Nova
Dave Nova, Chevrolet Technician
Category: Chevy
Satisfied Customers: 19451
Experience:  ASE Master Certification. GM World Class Certification
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NOW POWER AT ECM FUSES 1997 CHEV K-1500 5.7L

Customer Question

NOW POWER AT ECM FUSES 1997 CHEV K-1500 5.7L
Submitted: 1 year ago.
Category: Chevy
Expert:  Dave Nova replied 1 year ago.

Testing with key on or off?

Customer: replied 1 year ago.
On yesterday it would run on starting fluid so I replaced the fuel pump now there's no spark no power to the ECM fuses there's three in a row in fuse box under hood
Expert:  Dave Nova replied 1 year ago.

ECM B, ECM 1, and ENG 1 ? Do you have voltage at HORN fuse?

Customer: replied 1 year ago.
Have power horn fuse no power are ignition E ECM one engine one fuses
Customer: replied 1 year ago.
Horn works
Expert:  Dave Nova replied 1 year ago.

Check the maxifuses for power, especially the IGN A and IGN B fuses

Customer: replied 1 year ago.
All the Maxi fuses are good
Expert:  Dave Nova replied 1 year ago.

If there is voltage at these maxifuses then your problem is a failed ignition switch. These 3 fuses are all powered off the same contact within the ignition switch. Before replacing the switch, check wires at steering column leading up to the ignition switch. Sometimes these wires will break from flexing on vehicles with tilt steering columns. Wires are red and pink.

Customer: replied 1 year ago.
Why would it run yesterday Onstarting fluid And don't want to run after a new fuel pump
Expert:  Dave Nova replied 1 year ago.

It would just have to be coincidence. There is no way replacing the fuel pump would interfere with ignition switch or wiring. But if you have no voltage to these fuses, that is where your problem has to be.

Customer: replied 1 year ago.
If they kept cranking on it with a bad fuel pump with that damage in the ignition switch
Expert:  Dave Nova replied 1 year ago.

No, it would not typically damage the switch.

Customer: replied 1 year ago.
Isn't there a way to jump to those wires together to see if it'll run I remember a couple years ago I jumped two to test something I can't remember for sure
Expert:  Dave Nova replied 1 year ago.

Yes, at the fuse panel, use a jumper wire to connect power from a good fuse over to one of the fuses that does not have voltage. Then attempt to start. If it does then this confirms the diagnosis.

Customer: replied 1 year ago.
How do I sign up for unlimited question with a monthly fee
Expert:  Dave Nova replied 1 year ago.

You can subscribe to the service, copy and paste the link below to find out more about subscription services.

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