Question about 1995 Jeep Grand Cherokee

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1995 jeep cherokee

Where do i locate the cpu tester so that i can run the diagnostics

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  • jts2002 Dec 25, 2008

    i have trans prob.... blinks 21.,.,.,. then 55



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Hi there jaja,

Your Jeep has on board diagnostics that can help locate problems it is having. These diagnostics are normally accessed by a 'Code Reader' that plugs in to a socket normally located under the dash on the left side of the steering column.

You can buy a Code Reader for $60.00 to $100.00 and use it once. OR..(just a suggestion) you can do it manually, which will only cost you about ten minutes of your time. Here's how.

First off, what to expect:

  • The error codes are two digit numbers.
  • They are communicated in the form of a flashing light on your dashboard. It will blink a number of times followed by a short pause, then again followed by a longer pause.
  • The short pause separates the digits.
  • The long pause separates the individual codes
  • For example, Blink-Blink short pause Blink long pause would be a code 21
  • The codes will be displayed from lowest to highest
Are you ready?
  • Get a pen, a pad of paper, your keys and get in the Jeep.
  • Turn the ignition ON (not start)-OFF, ON-OFF, ON within 5 seconds.
  • Just after the last ON, the instrument panel will begin flashing.
  • Write down the flash patterns.
  • If you missed one, keep going. Then repeat the test.
When you finish, get back to me with the codes so I can look them up for you. They should tell us whats going on. Then we can act accordingly.

Remember: Good things come to those who Rate!


Posted on Aug 17, 2008

  • joshpfaffend Mar 08, 2011

    i dont know any of the codes, i did what you said and i got 1 blink than 2 short. than 5 short. 3 short. and 2 short. what could this be?




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