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Can,t get reading with scanner on 1994chevytrailblazercheckenginelightison

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1994 would still be the OBD I computer system. All you have to do is make a jumper out of a piece of wire, a metal paper clip works well, and short between terminals A and B on the ALDL plug.
can,t get reading with scanner on 1994chevytrailbl - d41c61d7-2ead-4951-aa0e-a0666ed639d2.gif
after you insert your jumper turn the key to the "ON" position and your check engine light will flash a series of flashes and pauses, then it will repeat. write down what the code is and then you will have to decode the number to get what the problem is.

Posted on Apr 21, 2013

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Posted on Jan 02, 2017

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the light is on because there is a fault
unless the scanner in use is very expensive ( $14,000.00) many hand held scanners do not have the ability( protocol) to read all cars ( the one I got for ($57.00 only reads Asian cars and some European cars)
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the fact that the car is not starting and the light is on indicates that there are faults

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