1999 Chevy Blazer service engine soon

Tiny
DSPRANGER
  • MEMBER
  • 1999 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 73,000 MILES
When I plug my scan tool into the diagnostic connection nothing comes up.
I've used the scan tool on my other vehicles and it works fine.
What's the problem?
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Friday, June 12th, 2009 AT 7:15 AM

7 Replies

Tiny
JDL
  • EXPERT


http://www.2carpros.com/forum/automotive_pictures/170934_16_pin_data_link_connector_1.jpg



Hello, pin 4 is chassis ground for the scan-tool, pin 16 is power for the scan-tool. If those two pins check out????

Does the mil come on, key on, no crank? I can talk to you about the basics, after that???
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Friday, June 12th, 2009 AT 11:39 AM
Tiny
DSPRANGER
  • MEMBER
I am not getting any power to the diagnostic plug.
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Tuesday, June 16th, 2009 AT 6:41 PM
Tiny
JDL
  • EXPERT
If your not getting any voltage to pin 16, check the fuse and circuit for the cigar lighter, fuse 2-- 15 amp.
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Wednesday, June 17th, 2009 AT 10:34 AM
Tiny
DSPRANGER
  • MEMBER
I checked the fuse and found that it was blown. I replaced the fuse and it blew right away. What now?
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Wednesday, June 17th, 2009 AT 7:00 PM
Tiny
JDL
  • EXPERT
Remove the cigar lighter from the socket. Check again, you can use a testlite across the fuse terminals instead of blowing all your fuses. If the lite comes on, the circuit is still grounded, somewhere.
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Thursday, June 18th, 2009 AT 8:02 AM
Tiny
DSPRANGER
  • MEMBER
I removed the cigar lighter, and used my digital voltmeter on a different set of fuse terminals. It checked out at 12 volts. I then checked the # 2 fuse terminals and I was getting readings all over the place, 300 to 180 to 65 and every number in between. What's next?
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Thursday, June 18th, 2009 AT 6:57 PM
Tiny
JDL
  • EXPERT
If you were using the voltage setting on the meter, I don't know how you got those numbers on a 12 volt system? I think you got a short on that circuit somewhere if the lighter element is ok.
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Friday, June 19th, 2009 AT 8:49 AM

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