Question about Chevrolet Blazer

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(1989 K5 Blazer) I have Very Low Voltage to the Fuel Pump, I checked out of the fuse block that plugs into the main wire harness on the firewall with my test light. I am getting very good voltage into the Fuse Bolck but very low coming out the fuel pump everything else on the K5 is fine. Any Clues that may Help ?

Posted by on

1 Answer

This won't help you, but may help me understand how
people think & work

You say good voltage into fuse block
Battery Voltage?

What role does a test light play there?

All your doing is dropping a load over
the bulb in the test light. Sure you got
something but what?

I assume your using a volt meter also!

Sounds as though you are capable of
diagnosing things.

Do you have diagrams.

How was very low voltage determined
& what are you supposed to have.

Need to know the system your working on

I hope that is food for thought & you will
share your ideas in a positive way

I would like to help but give us something
to work with

Posted on May 28, 2011

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Posted on Jan 02, 2017

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Fuel


You can check the Fuse to the fuel pump.
check the Fuel Relay.
check the Fuel wireing harness .
check the fuel pressure to see if fuel pump is working
change the fuel filter if fuel pressure too low for the injectors.
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