Question about 2000 Chevrolet Blazer

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Not commucating with computer

I took it to machanic and he said he can't commucate with the computer

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In this case he should know better then me and you.

Posted on Apr 22, 2013

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Chevrolet blazer 1999 not commucating with computer


Hi Bigdave, I'm glad to help!

Most of the time when you can't read the computer its because there's no power OR no ground at the DLC connector where they plug their test equipment into. If you have a test light check for power and ground at the DLC Connector. If it doesn't have power then most likely you have a blown fuse. If it doesn't have ground then you'll need to trace where the ground comes from and repair it. NOTE: If you have both power and ground at the DLC connector then there's something wrong with the wiring going to the engine controller OR the controller itself. Hope this helps and have an awesome day Bigdave.

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Key was left on and battery dead, next day recharge battery to 13 volts and car will not start. When key is turn to start all lights in dash go out except check engine light. Also my engine analyzer will...


this solution solves many and varied electronic issues with automobiles of different makes ,models and year . Simply disconect the battery ,wait 20 to 30 minuts ,clean battery posts and connectors ,if you do not have a battery post cleaner ,sandpaper will also work , the 30 min wait will allow the vehicle computor to reset itself .reconnect the battery ,do not use a hammer to reconnect cable to posts use the correct wrench 7/16 to 1/2 in is the approx size that you will need .if this does not work it is good knowledge for future referance pertaining to vehicle ellectronic issues ,I hope this little bit of trivial information works for you ,troubl shooting vehicle electronics can prove to be a nightmare esspecially if the problem is 2 different issues causing the problem .good luck

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hello,
you need to know which modual he was referring to . i would guess the "ccrm"constant controll relay modual little black box 1 plug about 3.5 inches by 5 inches located at the left front of engine compartment. i would also like to add that i would like to see you check or get it checked better before you spend the money as most dealers have a no electronics return policy and if you go used it is the same

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I Have a 2001 Ford Windstar with a 3,8 engine. I shorted the red wire on #4 fuel injector and now it will not crank and No commucation with the scanner. I have Replaced the PCM and still no Luck. All fuses...


I suggest you start over with the fuses. Fuse #1 30amp and fuse #20 15amp located in the fuse panel that is on the drivers side of the engine compartment should have protected the circuit. This circuit powers the pcm, the pats (chip key system) , and most of the electronics under the hood. I would go back and double check the fuses and if you checked them by pulling them out, I would check to see if they went back into the proper positions.
I hope this helps some and please let me know what you find.

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