Question about Chevrolet TrailBlazer

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We have a 2001 trail blazer the speedomter only works when lights are on and the heater blower stopped working could these be the cluster and or many things wrong

We had a new fuel pump put in and these others started could it be conneted

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  • Chevrolet Master
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The first thing to do would be check for DTC'S - diagnostic trouble codes in all the modules on the vehicle . Do you know what control modules are ? If there are no codes looking at a wiring diagram for the affected circuits . Do they share power (fuse) or a common ground point , this sounds like a lose ground problem , maybe . You can find free wiring diagrams at http://www.bbbind.com/free_tsb.html I would also suggest you watch basic automotive electrical trouble shooting videos , plus how to read wiring diagram's , Voltage drop testing etc.... on youtube . No one could say for sure if replacing the fuel pump had anything to do with your problem . Testing the affected electrical circuits will find the problem for sure . Electric Testing Techniques You Need to Know Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia .

Posted on Dec 28, 2016

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