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Check engine light

Is it possible that it was not mounted "check engin" light? I took off my dashboard, but there is no light bulb (no signs to be installed) and does not have the orange slide. The problem is the engine stalls after warm up. I wanted to perform error checking procedure, but its very difficult without "check engine" light :) Of course, I installed a new bulb, but it is not lit The car is Jeep ZJ 5.2 '93

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93 ZJ 5.2L grand cherokee.

FSM real. USA.

click emissions
see page 25-3 for flash codes.. its there. for your jeep
the Diagnostic is activated by fast ignition key cycles ,stated there.
in 5seconds.

next slide down to wiring. in the window. above.
page 8w-40-4
CEL lamp' schematic pin C2-6 blk/LG color
see the trip switch, this is the silly leaded fuel trip timimer

best i can tell this jeep has the CCD buss
the CLuster is stand alone processor. it communicates
from PCM to the Display VIC. the VIC glows the lamps.
Or has the GDM display, there are 2 options.
BASE graphics display module or VIC option.
ah page 8e-4 tells you the CEL is not hardwired lamp.
it uses the fancy back light display.

so do the key flash trick so see the display show CEL flash codes.
my guess, all this is in the log lost operators guide too.

Posted on Jan 02, 2014

  • 7 more comments 
  • jazzuse
    jazzuse Jan 03, 2014

    I know diagnostic procedure, this is not the first time ;)

  • _-__-___-_
    _-__-___-_ Jan 03, 2014

    great, most are rank noobs here. no problem but then again , with no FSM , we all are.... error after error, all car are different. in vast ways. some are same but look totally difference and things all moved.... did the FSM help, i think its the best link ever posted here.. for jeeps. so now you know there is no light, (descrete). the FSM even states, which lights are.

  • jazzuse
    jazzuse Jan 03, 2014

    Okey, its fied. There was a broken wire. Thanks sor everything.

  • _-__-___-_
    _-__-___-_ Jan 03, 2014

    fried, ouch. your WELCOME! now you have a full manual, i burned it to CD. , only 300MB

  • _-__-___-_
    _-__-___-_ Jan 03, 2014

    fried, if the lamp shorts this will blow the ECU CEL drive to kingdom come, ive fixed many, (comp level. tech i am)

  • _-__-___-_
    _-__-___-_ Jan 03, 2014

    real CEL , real tungstun lamps. not graphics displays. (depends on option package)

  • _-__-___-_
    _-__-___-_ Jan 03, 2014

    id be doing same thing , get ecu to blink,,, first...

  • jazzuse
    jazzuse Jan 03, 2014

    Problem solved. CEL works perfect. But its very strange. looks incredible, but not really a sign of the bulb (no dents on the copper track). This is not the first car to fix and I can tell when something was installed or not. Thanks for everything.

  • _-__-___-_
    _-__-___-_ Jan 03, 2014

    YES, and finding all the things last owner did or ignored is hard work..... good luck to you and happy new year.



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SOURCE: Jeep Grand Cherokee 1997. Getting check engine

Code 12 = Recently disconnected battery

Code 14 = Coolant sensor high resistance or shorted

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Code 55 End read code.

Hope helps (remember rated this).

Posted on Jun 12, 2010

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