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1988 Chevrolet Suburban Dies in ON

1988 CHEVROLET SUBURBAN
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HANDIMANRICK
  • MEMBER
  • 3 POSTS
My truck will start in the "crank" position and then die as soon as you put it in the "ON" position.
My question is;
1- what takes over once you release to the "ON" position? If it's the alternator,what wires are hot from the alternator in the "ON" position.
2- what wires are hot at the distributor in the "ON" position?
Thanks, Rick
909-597-5946
Nov 27, 2006 at 7:08 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
Sorry for the late reply.

There may be a problem with ignition switch. The primary voltage to coil and fuel injectors are hot with key in the on position. If those circuits have no voltage, the vehicle will not start and run. I always check the basics first, go from there.

I realize this is an old post. You may no longer own this vehicle. In the future hope you don't have any vehicle issues, but, if you do, keep the site in mind. They are always working to improve the site and it's free.

Have a good day.
Apr 6, 2015 at 5:28 AM
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Suggested Repair

Check the ignition switch and confirm primary voltage to the coil and fuel injectors with the key in ON. If those circuits have no voltage, the engine will not stay running; verify the basics first.

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Conversation Summary

The owner of a 1988 Chevrolet Suburban said the truck starts while cranking but dies as soon as the key is released to ON, and asked what powers the system afterward and which wires should be hot at the alternator and distributor. Expert JDL said the ignition switch may be faulty and that primary voltage to the coil and fuel injectors should be present with the key ON; without that voltage the vehicle will not stay running. Basics should be checked first.

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