'97 TJ Electrical Issues - Pirate4x4.Com : 4x4 and Off-Road Forum
 
Pirate4x4.Com : 4x4 and Off-Road Forum  

Go Back   Pirate4x4.Com : 4x4 and Off-Road Forum > Brand Specific Tech > Jeep - Non Hardcore
Notices

Reply
 
Share LinkBack Thread Tools Display Modes
Old 10-22-2007, 07:22 AM   #1 (permalink)
Granite Guru
 
Join Date: Apr 2003
Member # 18543
Location: Georgia
Posts: 812
'97 TJ Electrical Issues

I've got a buddy with a 97 TJ. His instrument cluster has stopped working. However, the airbag, brake, check engine light, etc, all work. Odometer is not working.

I went through it yesterday with a haynes wiring diagram and tried to figure out anything I could, but I made zero discoveries. From what I got from the wiring diagrams, I guess the gauges get their signal from the CCD bus? I removed the instrument cluster from its plugs to see if there was any corrosion or obvious damage, but nothing. I checked for continuity on the CCD bus twisted pair between the PCM connection for the CCD bus and the instrument cluster, and it checked out. I thought maybe a bad ground, but it looks like the nonfunctional gauges use the same ground as the functional warning lights, so I ruled that out too.

I'm thinking either fried PCM or fried instrument cluster. Are bad clusters a common failure in TJs? I had a ZJ for many years and never heard of problems like that. I guess ZJ's don't get rained in very often.


Anyway, just looking for a little guidance.

thanks,
Paul


edit: he had his stereo stolen about 4 months ago, and since then lost his gauges and a headlight. not likely the headlight is related, but the gauges may be?

also, checked the obvious fuses and the like. no discoveries there either.
__________________
CJ-7

Last edited by paulkeith; 10-22-2007 at 07:24 AM.
paulkeith is offline   Reply With Quote Quick reply to this message
Old 10-22-2007, 08:40 PM   #2 (permalink)
Registered User
 
Join Date: Jun 2007
Member # 94474
Posts: 8
I have heard that it is common. I have a 98 and have similar problems. I stumbled on a trick to make them all work a month or so ago. If I hit my horn it makes all the gauges work. Well, except for my temp gauge. It always reads 220 or so. I think tthat might be my sending unit on my thermostat is bad or atleast that is what I have been told. I think the two wiring harnesses behind the cluster need to be replaced. I am going to try that and hopefully that will do the trick.
supadupaj is offline   Reply With Quote Quick reply to this message
Sponsored Links
Old 10-23-2007, 03:51 AM   #3 (permalink)
Registered User
 
Randall Edge's Avatar
 
Join Date: Jul 2002
Member # 12992
Location: Savannah, Ga.
Posts: 336
Send a message via AIM to Randall Edge
Sounds like the common "NOBUSS" problem with TJ's. I've had it and its easy to fix. Pull the cluster back out and gently twist the pins in the connector on the back of the cluster with a pair of needle nose pliers. The pins that mate with the connector in the dash. Just give 'em a slight tweak maybe 10 or so. You just want to twist them enough to make them seat a little tighter. Then put it all back together. I think there is a TSB for it, but its easier to fix it yourself than take it back to the dealer. Sometimes a smack to the top of the dash will fix it for a while, but thats just temporary.
__________________
'48 Willys Truck.....sorta......

Last edited by Randall Edge; 10-23-2007 at 03:54 AM.
Randall Edge is offline   Reply With Quote Quick reply to this message
 
Old 10-23-2007, 04:58 AM   #4 (permalink)
Registered User
 
Join Date: Jun 2007
Member # 94474
Posts: 8
I tried the twisting thing on mine and it didnt do anything...It might work for others though
__________________
98 TJ...procomp and RE 5.5"....37x14.50 Toyos
supadupaj is offline   Reply With Quote Quick reply to this message
Old 10-23-2007, 06:02 AM   #5 (permalink)
Granite Guru
 
Join Date: Apr 2003
Member # 18543
Location: Georgia
Posts: 812
thanks for the responses.

supadupaj,

I'm not sure if the horn makes the gauges work. I'll ask my buddy to check it out.

randall,

sounds hopeful. the connection for the cluster was pretty ghetto feeling, i couldn't believe that the fit is just a flimsly metal bracket and a press fit to the cluster. my bmw m3 gauge cluster connectors were cam-locking lever-actuated things, solid as hell. anyway, i'll give this a shot.


also, i'm no TJ guru...were there any interior styling year breaks? will a cluster from any year TJ do the trick if we ever figure out that is the problem? does the cluster store the odometer mileage? on my ZJ, the odometer mielage was stored in the BCM, but do TJ's even have a BCM? sorry for the rampant newbage.

thanks again,
Paul
__________________
CJ-7
paulkeith is offline   Reply With Quote Quick reply to this message
Old 10-23-2007, 06:18 AM   #6 (permalink)
Granite Guru
 
Join Date: Apr 2003
Member # 18543
Location: Georgia
Posts: 812
so, i searched (earmuffs) JU thinking this might be a little more common over there, and found the TSB you speak of:

Quote:
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:
CodeDescriptionP8New Part

looks like this does not address fuel and oil issues, both of which he's got.

i did however also find this:
Quote:
did you check the fuses in the engine compartment too?

theres a mini fuse up there that, if blown, allows the lights to work but not the guages. let me know if thats the prob.

It's called the IOD, or Igniton Off Draw fuse. Basically, it's the stuff that draws juice and would be used in delivery of the vehicle. DC shipps them with the IOD fuse not installed, so that the battery won't go dead in transit. Then when the dealer preps them, they install the fuse and everything works. I remember when I used to work at the dealership and couldn't believe we got Jeeps that the gauges were dead on till one of the techs laughed, then explained it to me.
this sounds exactly like the problem. i'll scope it out and let you guys know for future reference.

Last edited by paulkeith; 10-23-2007 at 06:19 AM.
paulkeith is offline   Reply With Quote Quick reply to this message
Old 10-23-2007, 08:42 AM   #7 (permalink)
Registered User
 
Randall Edge's Avatar
 
Join Date: Jul 2002
Member # 12992
Location: Savannah, Ga.
Posts: 336
Send a message via AIM to Randall Edge
Quote:
Originally Posted by paulkeith View Post
...were there any interior styling year breaks? will a cluster from any year TJ do the trick if we ever figure out that is the problem? does the cluster store the odometer mileage? on my ZJ, the odometer mielage was stored in the BCM, but do TJ's even have a BCM?
Styling breaks are not the problem. They changed the computer buss style in '01 or '02. '97 - '00 should be the same though. Check some place like car-part.com to be sure. Not sure where the mileage is stored, I would guess the PCM. I just ordered a PCM for my TJ and they asked for my mileage, so maybe thats where its stored.
__________________
'48 Willys Truck.....sorta......
Randall Edge is offline   Reply With Quote Quick reply to this message
Old 10-23-2007, 09:39 AM   #8 (permalink)
Granite Guru
 
Join Date: Apr 2003
Member # 18543
Location: Georgia
Posts: 812
fixed!!!

ignition off draw, IOD, minifuse under the hood was blown. took out gauges but not warning lights, and also interior lights. replaced the switch and all is well.

thanks fellas,
Paul
paulkeith is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Pirate4x4.Com : 4x4 and Off-Road Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.

** A VERIFICATION EMAIL IS SENT TO THIS ADDRESS TO COMPLETE REGISTRATION!! **

Email Address:
Insurance
Please select your insurance company (Optional)

Log-in


Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 10:59 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 ©2011, Crawlability, Inc.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.