Question about 1999 Jeep Wrangler

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How do you check to see if your computer is bad on 1999 jeep wrangler

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Unless you are getting a fault code for a failed computer, chances are you have a sensor or sensor connector problem. Do a code scan and check all fuses and relays before doing any sensor tests. Chilton has the best wiring diagrams and both chilton and haynes list decent test procedures using a digital multi meter. If after all testing has shown no component or wiring problems then you can assume there may be a computer fault.
One note: Make sure all grounds and sub-grounds are good. There are usually at least six ground points on engine and fenders.

Posted on Jul 11, 2010

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Posted on Jan 02, 2017

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