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2000 blazer instument cluster, odometer and prnd21 wont lite.

My problem is with the 2000 chevy blazer 4.3. instrument cluster. The odometer and P R N D 2 1 displays ( blue/grn characters ) wont light up with the key in the run position, but it will in the unlock position. To see them i have to shut the truck off by rotating the key back one click. When i go to start the truck i rotate the key out of lock to unlock and the displays come on, then rotate to the run position and they go out, but the gages and lights come on. When i rotate it to start it comes on while cranking, then release the key back to run and it goes out. Can you help ? Rich

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6 Suggested Answers

  • 3 Answers

SOURCE: INSTRUMENT CLUSTER

yes you need to replase the body control module

Posted on Jul 04, 2008

  • 18 Answers

SOURCE: 1991 Volvo 740GL Speedometer

I remove two panel underneath the steering column. The first panel is removed using a 10 mm socket. The second panel is removed using a torx socket (can't remember the size). Removing these two panels gives you room to get to the clip on speedomter. Looking at the speedometer, you should see two rectangular holes on each side of the speedometer cover. I use a awl to push in the clip (you could use a screwdriver). Looking underneath the dash, you should be able to see the clip you are pushing on with the awl. I take my 2nd awl and put it behind the clip. I get the left side to release. One the speedometer cover releases, you can see the speedometer. You will see the 4 torx screws (t20) and two smaller clips holding the speedometer. All that is left is the wiring. (I take a sharpie pen and mark one of my wire locations on the speedometer. I am not sure what it does. It is a single wire.)

Posted on Aug 20, 2008

psds4
  • 293 Answers

SOURCE: Instrument Cluster Replacement

it will register the car it came out of and you can not change the milage you would nrrd to send it out

Posted on Sep 22, 2008

  • 1 Answer

SOURCE: 1997 chevy blazer wont start

same just happend 2 me,was told it was the neutral safety switch -but didnt start in neutral-took 2 shop 400 later it was the ignition switch runs great again hope i helped

Posted on Feb 24, 2009

honeymokey
  • 3113 Answers

SOURCE: light showing odometer and what gear transmission

The cluster will have to be sent out for repairs or exchange by a dealer or see Model Electronics.

Posted on Jul 08, 2009

  • 1 Answer

SOURCE: instrument panel cluster gauges and odometer has stopped working

I had all my analog instrument panel gauges stop working after they did the state emissions test. I found the proper fuse in the fuse block located under the hood. Simply unplugged the fuse, noticed it was still good, and plugged the same fuse (10A) back in and all the gauges started working again. Guess it needed a reset atfer they plugged in for the emissions.

Posted on Aug 14, 2009

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Wont start my odometer blinks and says no bus


From the official Durango shop manual......(abbreviated)

Self Diagnosis Test

Vehicle key position is OFF ,or able to pull key out.
Hold in the trip odometer button (dont release yet)
Turn key to the ON position (one notch), but DON'T try to start the engine
Continue holding the trip button for about 10-12 seconds until CHEC appears in the odometer display
Release the trip button.
Series of three digit numeric failure codes may appear.
If no failure message appears, the self diagnostic test will proceed as described in step 6


Code Chart

110- cluster CPU,RAM,EEPROm failure, replace cluster

900-CCD data bus not operational, check CCD data bus connections at cluster, check the cluster fuses,check the CCD data bus bias, cehck the CCD data bus voltage, check the CCD data bus terminations.

920-cluster is not recieving a vehicle speed message from the PCM, check PCM software level and reflash if required, use the ($2500+) DRBIII scan tool to verify the vehicle speed message is being sent by the PCM

921-the cluster is not recieveing a distance pulse message from PCM,check PCM software level and reflash if required, use the ($2500+) DRBIII scan tool to verify the distance pulse message is being sent by the PCM

940-the cluster is not recieving an airbag lamp-on message from the ACM, check the CCD data bus connections at the ACM, check the ACM fuse.

950-cluster not recieving an ABS lamp-on message from the CAB, check CCD data bus connections at the ACM, check the ACM fuse.

960- clsuter not recieving a PRND21 message from the TCM, check the CCD data bus connections at the TCM, check the TCM fuse.

999-An error has been discovered, record the failure message, depress the trip odometer reset button to continue the Self-Diagnostic Test

Step 6
Instrument cluster will test each segment of the odometer (all first, then each one seperately)

Step 7
Bulb test

Step 8
Gauge test

Step 9
test completed

The instrument cluster will return to normal operation at the completion of test, if ignition switch turned off, or a vehicle speed message indicating movement recieved from the PCM on the CCD data bus.

Hope that help you or anyone else in future.

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