1998 Chevrolet Astro Logo
Marco Antonio Peña Olmos Posted on Jun 01, 2009
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1998 chevy astro van ecm II fuse(20amp)burn out continually

After drive the van for like 20 minutes the fuse burn out and when i stoped at the gas station to put gas in the van, didn't start anymore, what cuold be the problem and how to troubleshoot?

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Vincent G

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  • Chevrolet Master 2,363 Answers
  • Posted on Aug 03, 2009
Vincent G
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Joined: Jul 09, 2009
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The first thing you should do is to locate the oil pressure switch/sending unit.


This switch serves two functions.

1) provide oil pressure reading

2) disable the fuel pump relay in event of oil pressure loss.

===

When this switch is failing to provide the correct pressure to the ECU. The wiring harness can overheat and eventually create a short.

ECM2 fuse blow is because the harness is grounding/shorting.

===

DO NOT drive the truck until you change the oil pressure switch.

After you change the switch,you should spend sometime to inspect the wiring between the fuel pump relay,ECU and fuel pump.


Please post up day on the comment window/page.

I will follow up on it later.


Good luck.

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