I have a 97 blazer with some issues, but the odd one is I cannot connect to my computer. Every now and then I get a random engine light but when I hook up a scan tool it says it cannot cummunicate with the computer. Any had this problem before? The truck runs and drives, just cant see what is going on. Help!

 

gotta make sure of the obvious...you do have the ignition in the ON position when you try to read it correct?

 

did you check the fuse?

 

CIG fuse powers the DLC as well.

 

umm....does the scan tool work on another vehicle?

 

do you have the correct connector plug?

 

Yes scan tool works with other vehicles and yes key it on....What fues do I need to check? I did not know the connector had a fues.

 

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