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93 Jeep yj

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DG4x4 profile image

Jan 10, 2007, 12:24 AM

Post #1 of 6 (756 views)
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I have a 93 jeep that drops rpms causing a 'check ingine' light to appear. This happens randomly. It clears itself once it is restarted. When I hooked up the diagnostics it came back 'ac clutch short'. Does anyone have an idea what to check first?

steve01832 profile image

Jan 10, 2007, 5:11 AM

Post #2 of 6 (752 views)
Re: 93 Jeep yj [In reply to] Sign In

Unplug the electrical connector at the A/C clutch. If the code goes away, the problem is the clutch. If the code comes back, you either have a wiring problem, a relay problem, or a PCM problem. Further diagnosis is needed at that point.


Anonymous Poster

Jan 11, 2007, 10:17 PM

Post #3 of 6 (747 views)
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Is the 'A/C clutch' code that appears for 'A/C'? Silly question I know, but I don't have A/C. I recently change the water pump and alternator. I wouldn't think either of these would possible cause this, but could they? If I routed the belt wrong? Thank You for the previous info.

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DG4x4 profile image

Jan 12, 2007, 3:13 AM

Post #4 of 6 (743 views)
Re: 93 Jeep yj [In reply to] Sign In

Thanks for the info. I'll try reading the manual to fing those items. Post #3 was a question for you. Sorry (New User). Thanks again.

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 12, 2007, 4:41 AM

Post #5 of 6 (741 views)
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Just a note: You almost can't route a belt wrong but they do need to be in exactly the right grooves. Good luck, T
Long retired now

steve01832 profile image

Jan 12, 2007, 6:33 AM

Post #6 of 6 (738 views)
Re: 93 Jeep yj [In reply to] Sign In

Often times the manufacturer uses the same PCM for vehicles with A/C and without. If the A/C components are not there then these codes will set. We just ignore them because there is no way to keep them from coming back. An A/C clutch code should not kick the MIL. Double check the code the next time it comes back. Also, double check the code definitions because the code may mean something else if the vehicle is not equipped with A/C.


93 Jeep yj

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