Instrument cluster out

MRBARTEK11

MEMBER
2002 CHEVROLET TAHOE
4.8L
V8
2WD
AUTOMATIC
190,000 MILES

Hi, I just recently purchased the SUV listed above. They told me the cluster was out and I could replace it and it will work. Well I replaced it and that not the issue. What else could be wrong? All the grounds are getting ground. Auxiliary 20 amp fuse keeps blowing as well.

Sunday, March 3rd, 2019 AT 5:09 PM

5 Replies

JACOBANDNICKOLAS

MECHANIC
110,114 POSTS

Hi and thanks for using 2CarPros.

Are you referring to the aux fuse number 41? See pictures 1 and 2.

Also, pictures 3, 4, and 5 show the instrument cluster wiring schematic. I need to know if anything on the cluster works and if you purchases a new or used cluster. These things were known to go bad and if you got a used one, chances are you may have gotten another bad one.

Let me know.

Joe

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Sunday, March 3rd, 2019 AT 6:39 PM

MRBARTEK11

MEMBER
3 POSTS

That is the fuse that keeps blowing. I actually tried a rebuilt cluster.

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Thursday, March 7th, 2019 AT 6:45 PM

JACOBANDNICKOLAS

MECHANIC
110,114 POSTS

Did the same fuse blow prior to replacement?

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Thursday, March 7th, 2019 AT 7:13 PM

MRBARTEK11

MEMBER
3 POSTS

Yes it did. We replaced the fuse then put in the new cluster and it blew. Possible wiring issue we are assuming.

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Thursday, March 7th, 2019 AT 8:03 PM

JACOBANDNICKOLAS

MECHANIC
110,114 POSTS

Welcome back:

I dug a little deeper. The 20 amp Aux fuse doesn't have to do with the cluster. It is for the accessory outlets in the front. I suspect they aren't working. See pictures 1 and 2.

With that, I suggest locating the body relay block under the dash. It is powered by the ignition fuse 1. See picture 4. The fuse is in the instrument panel fuse box on the driver's side. Make sure the fuse is good and then you need to check if there is power to the relay block. See picture 3 for wire color and location.

Here are a few links that you may find helpful:

https://www.2carpros.com/articles/how-a-car-fuse-works

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

Let me know if this helps. Also, if you have questions or need help, let me know. Since this panel doesn't work either, I have a feeling it just isn't getting power.

Take care,
Joe

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