Hello
Every time I drive my blazer the #10 fuse blows after about 20 minutes of driving. It is listed in the manual as PCM/VCM Ignition, Injectors, Crank Sensor, Coil Driver Module. Does anybody have a suggestion as to what I should change to try to get this to stop. The vehicle does not show the check engine light and runs fine until the fuse blows.

 

Below is the wiring diagram that describes this circuit. It sounds like you have one of these components that is drawing too much current or possibly you have damaged wire that is overheating, causing the resistance to rise and blow the fuse...


^CLICK for full image^

Just ignore the LN2 section, it is the 4 cylinder from the S10.

One thing that you could try is measuring the resistance on the main power wires for each of the components utilizing that fuse.

 

Thanks I will check this out.

 

ever figure out what this was????