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Old 07-22-2009, 01:56 PM   #1
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What made this happen?

Okay, new problem...
Yesterday I was driving my jeep when all of a sudden the Airbag light on the dash came on and then all of the gauges stopped working. The check engine light never came on. After about 30 seconds everything started working again. It did this a few times, never sounded any different and starts back up just fine. What is causing this?

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Old 07-22-2009, 02:00 PM   #2
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Its usually one the two connectors that plug in the back of the instrument cluster. It just needs to be pushed back in, its common on TJ's.

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Old 07-22-2009, 02:04 PM   #3
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Old 07-22-2009, 02:22 PM   #4
Knows a couple things...

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One way to help those two connectors stay firmly connected to each other is after unplugging the instrument cluster, use needle nose pliers to very slightly flatten each of the male pins in the two connectors so they make a better electrical connection with the female half of the plug. Be gentle when doing this, the male pins only need gentle pressure with the needle nose pliers to flatten just enough to make them a tad wider to make a better connection. I did this once to mine 12 years ago and it's been fine ever since.
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Old 07-22-2009, 07:27 PM   #5
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Thanks for the help guys!
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1999 TJ 2.5
Aftermarket Header with Flowmaster
ARB Safari Snorkel with Airaid box
TB spacer/Bored out TB
4" Rough Country Lift
33x12.50 Maxxis Bighorns on 15x8 Cragar Soft 8's
Classic Rock Rear Bumper with Tire Carrier
Custom front bumper
4.88 gears

1998 BMW 328i (Wife's)
Upgraded sound and DVD players

2003 Honda RVT1000R (RC51)
Sako pipes
Power commander
Adjustable steering damper, fender eliminator, led's

2005 Kawasaki Vulcan 500 (Wife's)
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Old 07-22-2009, 07:28 PM   #6
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Hope it gets you fixed up bud....happy wrenching.
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Old 07-22-2009, 07:29 PM   #7
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even easier then the pliers idea I just zip tie the connections together and don't have to worry bout it again.
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Old 07-22-2009, 07:50 PM   #8
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One thing to keep in mind is that the electrical connections made by the pins inside can become intermittent even with the plug halves fully seated. That's the issue with this particular pair of plugs, not that the plugs physically pull apart.
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Old 07-22-2009, 09:14 PM   #9
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Quote:
Originally Posted by Jerry Bransford View Post
One way to help those two connectors stay firmly connected to each other is after unplugging the instrument cluster, use needle nose pliers to very slightly flatten each of the male pins in the two connectors so they make a better electrical connection with the female half of the plug. Be gentle when doing this, the male pins only need gentle pressure with the needle nose pliers to flatten just enough to make them a tad wider to make a better connection. I did this once to mine 12 years ago and it's been fine ever since.
God Jerry, this post gave me the chills.

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Old 07-22-2009, 11:38 PM   #10
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Chrysler has a tech bulletin out on the subject apparently there is corrosion build up between the connector and where it plugs into the instrument cluster. Chrysler recomends upgrading with a new pigtail harness, but many have fixed the problem with cleaning the connector plug and coating with dielectric grease.


NO: 08-15-99
SUBJECT: Erratic, Intermittent Cluster Operation/Intermittent Air Bag Warning light.
DATE: May 21, 1999

OVERVIEW:
This bulletin involves installing a repair harness containing a revised instrument cluster connector.

SYMPTOM/CONDITION:
Some vehicles may exhibit an intermittent illumination of the air bag warning light or an intermittent tachometer or speedometer drop out. An Airbag Electronic Control Module (AECM) fault code -"No Cluster CCD BUS " message will be present.

DIAGNOSIS:
This condition is caused by minor oxidation of the BUS circuit terminals at the instrument cluster connector. Electrical terminals will show signs of oxidation, which will appear as darkened lines or marks on the cluster male terminals. These often appear as gray or black marks rather than the appearance of oxidation or corrosion usually associated with higher current carrying circuits. THIS TECHNICAL SERVICE BULLETIN WILL NOT ADDRESS FUEL OR OIL PRESSURE GAUGE ISSUES.

PARTS REQUIRED:
Part No. Description
105016261AA Cluster Connector Patch Harness
104856975 Electric Contact Cleaner
204778570 Heat Shrink Tubing


REPAIR PROCEDURE:
Disconnect the negative battery cable.
Remove the instrument cluster using the procedures outlined in the appropriate servicemanual.
Inspect the male terminals of pins 1 & 2 on the instrument cluster connector labeled CNB. The oxidation will appear as gray or black lines or marks on the terminals. If any signs of oxidation are present, remove them by gently scraping the terminals with a small flat bladed screw driver until the oxidation is gone. Use of a magnifying glass may be helpful. Use caution when performing this operation. Do not apply excessive force to the terminals to avoid bending them or damaging the cluster or terminals. Do not use a sharp tool, knife or sand paper, which could remove the protective plating from the terminals. Do not use any cleaner other than p/n 04856975. Other chemical cleaners could damage the instrument cluster.
Clean the male terminals with Electrical Contact cleaner, p/n 04856975. Apply the cleaner sparingly holding the cluster with the connector facing down to avoid excessive amount of cleaner from entering the cluster.
Remove the green cluster connector from the bracket.
Using wire cutters, remove the instrument cluster harness connector from the harness. Remove only the connector containing the BUS circuit This connector is labeled CBA on the cluster. Cut the wires as close to the insulator as possible.
The new connector must be soldered onto the harness. This operation requires a technician who is skilled at soldering to avoid a cold solder joint. Position the harness and align the wires with the patch harness, matching the color codes match the main wire colors. NOTE: THE XJ INSTRUMENT PANEL CONTAINS ONE MORE CIRCUIT IN THIS CONNECTOR THAN THE TJ. CUT THE UNUSED WIRE CLOSE TO THE CONNECTOR ON TJ MODELS.
Stagger cut the main harness and patch harness wires so that the solder joints will be 1/2 inch apart. Remove 1/2 inch of insulation from the wires. The new harness will have a dark blue with no tracer. This will mate with a dark blue wire with a green tracer on TJ and with a dark blue wire with a white tracer on XJ.
Slide a piece of heat shrink tubing over the wires and twist the wires together for each respective circuit.
Solder each circuit using rosin core solder. Be sure to heat the wire enough to allow the solder to melt when it comes in contact with wire. Do not use acid core solder.
Position the heat shrink tubing over the solder joints and shrink the tubing using a heat gun.
Install the connector to the bracket.
Install the instrument cluster.
Connect the battery cable.
Verify correct operation of the cluster.
POLICY:
Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:
Labor Op. No.Time08-90-90-910.6 Hrs.

FAILURE CODE:
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Old 07-27-2009, 05:18 PM   #11
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HI Guys,

This just started to happen to me today, glad to hear that it's not a big deal. I was kind of afraid the airbag might deploy..LOL. Does anyone know of an online reference to pulling the instrument cluster so I can tighten the connections? If I just go into this blind, I'll end up with the whole dash taken out.

Thanks,
Steve-o
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Old 08-08-2009, 06:07 PM   #12
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Originally Posted by Steveo384 View Post
HI Guys,

This just started to happen to me today, glad to hear that it's not a big deal. I was kind of afraid the airbag might deploy..LOL. Does anyone know of an online reference to pulling the instrument cluster so I can tighten the connections? If I just go into this blind, I'll end up with the whole dash taken out.

Thanks,
Steve-o
Look for the jeep manual thread here, download it for your year/ model and it should have all the info you need to remove the cluster.

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